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-rw-r--r--arch/x86/platform/Makefile1
-rw-r--r--arch/x86/platform/efi/Makefile1
-rw-r--r--arch/x86/platform/efi/early_printk.c83
-rw-r--r--arch/x86/platform/efi/efi-bgrt.c12
-rw-r--r--arch/x86/platform/efi/efi.c487
-rw-r--r--arch/x86/platform/efi/efi_32.c13
-rw-r--r--arch/x86/platform/efi/efi_64.c377
-rw-r--r--arch/x86/platform/efi/efi_stub_64.S247
-rw-r--r--arch/x86/platform/efi/efi_thunk_64.S65
-rw-r--r--arch/x86/platform/intel-mid/device_libs/Makefile1
-rw-r--r--arch/x86/platform/intel-mid/device_libs/platform_wdt.c72
-rw-r--r--arch/x86/platform/olpc/olpc-xo1-pm.c2
-rw-r--r--arch/x86/platform/ts5500/ts5500.c2
-rw-r--r--arch/x86/platform/uv/bios_uv.c2
-rw-r--r--arch/x86/platform/uv/uv_irq.c10
-rw-r--r--arch/x86/platform/uv/uv_nmi.c2
-rw-r--r--arch/x86/platform/visws/Makefile1
-rw-r--r--arch/x86/platform/visws/visws_quirks.c608
18 files changed, 1079 insertions, 907 deletions
diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
index 20342d4c82c..85afde1fa3e 100644
--- a/arch/x86/platform/Makefile
+++ b/arch/x86/platform/Makefile
@@ -9,5 +9,4 @@ obj-y += olpc/
obj-y += scx200/
obj-y += sfi/
obj-y += ts5500/
-obj-y += visws/
obj-y += uv/
diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile
index b7b0b35c198..d51045afcaa 100644
--- a/arch/x86/platform/efi/Makefile
+++ b/arch/x86/platform/efi/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
obj-$(CONFIG_ACPI_BGRT) += efi-bgrt.o
obj-$(CONFIG_EARLY_PRINTK_EFI) += early_printk.o
+obj-$(CONFIG_EFI_MIXED) += efi_thunk_$(BITS).o
diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c
index 81b506d5bef..52414211729 100644
--- a/arch/x86/platform/efi/early_printk.c
+++ b/arch/x86/platform/efi/early_printk.c
@@ -14,48 +14,92 @@
static const struct font_desc *font;
static u32 efi_x, efi_y;
+static void *efi_fb;
+static bool early_efi_keep;
-static __init void early_efi_clear_scanline(unsigned int y)
+/*
+ * efi earlyprintk need use early_ioremap to map the framebuffer.
+ * But early_ioremap is not usable for earlyprintk=efi,keep, ioremap should
+ * be used instead. ioremap will be available after paging_init() which is
+ * earlier than initcall callbacks. Thus adding this early initcall function
+ * early_efi_map_fb to map the whole efi framebuffer.
+ */
+static __init int early_efi_map_fb(void)
{
- unsigned long base, *dst;
- u16 len;
+ unsigned long base, size;
+
+ if (!early_efi_keep)
+ return 0;
base = boot_params.screen_info.lfb_base;
- len = boot_params.screen_info.lfb_linelength;
+ size = boot_params.screen_info.lfb_size;
+ efi_fb = ioremap(base, size);
+
+ return efi_fb ? 0 : -ENOMEM;
+}
+early_initcall(early_efi_map_fb);
+
+/*
+ * early_efi_map maps efi framebuffer region [start, start + len -1]
+ * In case earlyprintk=efi,keep we have the whole framebuffer mapped already
+ * so just return the offset efi_fb + start.
+ */
+static __init_refok void *early_efi_map(unsigned long start, unsigned long len)
+{
+ unsigned long base;
+
+ base = boot_params.screen_info.lfb_base;
+
+ if (efi_fb)
+ return (efi_fb + start);
+ else
+ return early_ioremap(base + start, len);
+}
- dst = early_ioremap(base + y*len, len);
+static __init_refok void early_efi_unmap(void *addr, unsigned long len)
+{
+ if (!efi_fb)
+ early_iounmap(addr, len);
+}
+
+static void early_efi_clear_scanline(unsigned int y)
+{
+ unsigned long *dst;
+ u16 len;
+
+ len = boot_params.screen_info.lfb_linelength;
+ dst = early_efi_map(y*len, len);
if (!dst)
return;
memset(dst, 0, len);
- early_iounmap(dst, len);
+ early_efi_unmap(dst, len);
}
-static __init void early_efi_scroll_up(void)
+static void early_efi_scroll_up(void)
{
- unsigned long base, *dst, *src;
+ unsigned long *dst, *src;
u16 len;
u32 i, height;
- base = boot_params.screen_info.lfb_base;
len = boot_params.screen_info.lfb_linelength;
height = boot_params.screen_info.lfb_height;
for (i = 0; i < height - font->height; i++) {
- dst = early_ioremap(base + i*len, len);
+ dst = early_efi_map(i*len, len);
if (!dst)
return;
- src = early_ioremap(base + (i + font->height) * len, len);
+ src = early_efi_map((i + font->height) * len, len);
if (!src) {
- early_iounmap(dst, len);
+ early_efi_unmap(dst, len);
return;
}
memmove(dst, src, len);
- early_iounmap(src, len);
- early_iounmap(dst, len);
+ early_efi_unmap(src, len);
+ early_efi_unmap(dst, len);
}
}
@@ -79,16 +123,14 @@ static void early_efi_write_char(u32 *dst, unsigned char c, unsigned int h)
}
}
-static __init void
+static void
early_efi_write(struct console *con, const char *str, unsigned int num)
{
struct screen_info *si;
- unsigned long base;
unsigned int len;
const char *s;
void *dst;
- base = boot_params.screen_info.lfb_base;
si = &boot_params.screen_info;
len = si->lfb_linelength;
@@ -109,7 +151,7 @@ early_efi_write(struct console *con, const char *str, unsigned int num)
for (h = 0; h < font->height; h++) {
unsigned int n, x;
- dst = early_ioremap(base + (efi_y + h) * len, len);
+ dst = early_efi_map((efi_y + h) * len, len);
if (!dst)
return;
@@ -123,7 +165,7 @@ early_efi_write(struct console *con, const char *str, unsigned int num)
s++;
}
- early_iounmap(dst, len);
+ early_efi_unmap(dst, len);
}
num -= count;
@@ -179,6 +221,9 @@ static __init int early_efi_setup(struct console *con, char *options)
for (i = 0; i < (yres - efi_y) / font->height; i++)
early_efi_scroll_up();
+ /* early_console_register will unset CON_BOOT in case ,keep */
+ if (!(con->flags & CON_BOOT))
+ early_efi_keep = true;
return 0;
}
diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c
index 7145ec63c52..f15103dff4b 100644
--- a/arch/x86/platform/efi/efi-bgrt.c
+++ b/arch/x86/platform/efi/efi-bgrt.c
@@ -42,14 +42,15 @@ void __init efi_bgrt_init(void)
if (bgrt_tab->header.length < sizeof(*bgrt_tab))
return;
- if (bgrt_tab->version != 1)
+ if (bgrt_tab->version != 1 || bgrt_tab->status != 1)
return;
if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
return;
image = efi_lookup_mapped_addr(bgrt_tab->image_address);
if (!image) {
- image = ioremap(bgrt_tab->image_address, sizeof(bmp_header));
+ image = early_memremap(bgrt_tab->image_address,
+ sizeof(bmp_header));
ioremapped = true;
if (!image)
return;
@@ -57,7 +58,7 @@ void __init efi_bgrt_init(void)
memcpy_fromio(&bmp_header, image, sizeof(bmp_header));
if (ioremapped)
- iounmap(image);
+ early_iounmap(image, sizeof(bmp_header));
bgrt_image_size = bmp_header.size;
bgrt_image = kmalloc(bgrt_image_size, GFP_KERNEL);
@@ -65,7 +66,8 @@ void __init efi_bgrt_init(void)
return;
if (ioremapped) {
- image = ioremap(bgrt_tab->image_address, bmp_header.size);
+ image = early_memremap(bgrt_tab->image_address,
+ bmp_header.size);
if (!image) {
kfree(bgrt_image);
bgrt_image = NULL;
@@ -75,5 +77,5 @@ void __init efi_bgrt_init(void)
memcpy_fromio(bgrt_image, image, bgrt_image_size);
if (ioremapped)
- iounmap(image);
+ early_iounmap(image, bmp_header.size);
}
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index d62ec87a2b2..87fc96bcc13 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -52,6 +52,7 @@
#include <asm/tlbflush.h>
#include <asm/x86_init.h>
#include <asm/rtc.h>
+#include <asm/uv/uv.h>
#define EFI_DEBUG
@@ -67,9 +68,7 @@ struct efi_memory_map memmap;
static struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
-unsigned long x86_efi_facility;
-
-static __initdata efi_config_table_type_t arch_tables[] = {
+static efi_config_table_type_t arch_tables[] __initdata = {
#ifdef CONFIG_X86_UV
{UV_SYSTEM_TABLE_GUID, "UVsystab", &efi.uv_systab},
#endif
@@ -78,16 +77,7 @@ static __initdata efi_config_table_type_t arch_tables[] = {
u64 efi_setup; /* efi setup_data physical address */
-/*
- * Returns 1 if 'facility' is enabled, 0 otherwise.
- */
-int efi_enabled(int facility)
-{
- return test_bit(facility, &x86_efi_facility) != 0;
-}
-EXPORT_SYMBOL(efi_enabled);
-
-static bool __initdata disable_runtime = false;
+static bool disable_runtime __initdata = false;
static int __init setup_noefi(char *arg)
{
disable_runtime = true;
@@ -120,7 +110,7 @@ static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
efi_status_t status;
spin_lock_irqsave(&rtc_lock, flags);
- status = efi_call_virt2(get_time, tm, tc);
+ status = efi_call_virt(get_time, tm, tc);
spin_unlock_irqrestore(&rtc_lock, flags);
return status;
}
@@ -131,7 +121,7 @@ static efi_status_t virt_efi_set_time(efi_time_t *tm)
efi_status_t status;
spin_lock_irqsave(&rtc_lock, flags);
- status = efi_call_virt1(set_time, tm);
+ status = efi_call_virt(set_time, tm);
spin_unlock_irqrestore(&rtc_lock, flags);
return status;
}
@@ -144,8 +134,7 @@ static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
efi_status_t status;
spin_lock_irqsave(&rtc_lock, flags);
- status = efi_call_virt3(get_wakeup_time,
- enabled, pending, tm);
+ status = efi_call_virt(get_wakeup_time, enabled, pending, tm);
spin_unlock_irqrestore(&rtc_lock, flags);
return status;
}
@@ -156,8 +145,7 @@ static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
efi_status_t status;
spin_lock_irqsave(&rtc_lock, flags);
- status = efi_call_virt2(set_wakeup_time,
- enabled, tm);
+ status = efi_call_virt(set_wakeup_time, enabled, tm);
spin_unlock_irqrestore(&rtc_lock, flags);
return status;
}
@@ -168,17 +156,17 @@ static efi_status_t virt_efi_get_variable(efi_char16_t *name,
unsigned long *data_size,
void *data)
{
- return efi_call_virt5(get_variable,
- name, vendor, attr,
- data_size, data);
+ return efi_call_virt(get_variable,
+ name, vendor, attr,
+ data_size, data);
}
static efi_status_t virt_efi_get_next_variable(unsigned long *name_size,
efi_char16_t *name,
efi_guid_t *vendor)
{
- return efi_call_virt3(get_next_variable,
- name_size, name, vendor);
+ return efi_call_virt(get_next_variable,
+ name_size, name, vendor);
}
static efi_status_t virt_efi_set_variable(efi_char16_t *name,
@@ -187,9 +175,9 @@ static efi_status_t virt_efi_set_variable(efi_char16_t *name,
unsigned long data_size,
void *data)
{
- return efi_call_virt5(set_variable,
- name, vendor, attr,
- data_size, data);
+ return efi_call_virt(set_variable,
+ name, vendor, attr,
+ data_size, data);
}
static efi_status_t virt_efi_query_variable_info(u32 attr,
@@ -200,13 +188,13 @@ static efi_status_t virt_efi_query_variable_info(u32 attr,
if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
return EFI_UNSUPPORTED;
- return efi_call_virt4(query_variable_info, attr, storage_space,
- remaining_space, max_variable_size);
+ return efi_call_virt(query_variable_info, attr, storage_space,
+ remaining_space, max_variable_size);
}
static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)
{
- return efi_call_virt1(get_next_high_mono_count, count);
+ return efi_call_virt(get_next_high_mono_count, count);
}
static void virt_efi_reset_system(int reset_type,
@@ -214,8 +202,8 @@ static void virt_efi_reset_system(int reset_type,
unsigned long data_size,
efi_char16_t *data)
{
- efi_call_virt4(reset_system, reset_type, status,
- data_size, data);
+ __efi_call_virt(reset_system, reset_type, status,
+ data_size, data);
}
static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules,
@@ -225,7 +213,7 @@ static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules,
if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
return EFI_UNSUPPORTED;
- return efi_call_virt3(update_capsule, capsules, count, sg_list);
+ return efi_call_virt(update_capsule, capsules, count, sg_list);
}
static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules,
@@ -236,8 +224,8 @@ static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules,
if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
return EFI_UNSUPPORTED;
- return efi_call_virt4(query_capsule_caps, capsules, count, max_size,
- reset_type);
+ return efi_call_virt(query_capsule_caps, capsules, count, max_size,
+ reset_type);
}
static efi_status_t __init phys_efi_set_virtual_address_map(
@@ -249,34 +237,19 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
efi_status_t status;
efi_call_phys_prelog();
- status = efi_call_phys4(efi_phys.set_virtual_address_map,
- memory_map_size, descriptor_size,
- descriptor_version, virtual_map);
+ status = efi_call_phys(efi_phys.set_virtual_address_map,
+ memory_map_size, descriptor_size,
+ descriptor_version, virtual_map);
efi_call_phys_epilog();
return status;
}
-static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
- efi_time_cap_t *tc)
-{
- unsigned long flags;
- efi_status_t status;
-
- spin_lock_irqsave(&rtc_lock, flags);
- efi_call_phys_prelog();
- status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm),
- virt_to_phys(tc));
- efi_call_phys_epilog();
- spin_unlock_irqrestore(&rtc_lock, flags);
- return status;
-}
-
int efi_set_rtc_mmss(const struct timespec *now)
{
unsigned long nowtime = now->tv_sec;
- efi_status_t status;
- efi_time_t eft;
- efi_time_cap_t cap;
+ efi_status_t status;
+ efi_time_t eft;
+ efi_time_cap_t cap;
struct rtc_time tm;
status = efi.get_time(&eft, &cap);
@@ -294,9 +267,8 @@ int efi_set_rtc_mmss(const struct timespec *now)
eft.second = tm.tm_sec;
eft.nanosecond = 0;
} else {
- printk(KERN_ERR
- "%s: Invalid EFI RTC value: write of %lx to EFI RTC failed\n",
- __FUNCTION__, nowtime);
+ pr_err("%s: Invalid EFI RTC value: write of %lx to EFI RTC failed\n",
+ __func__, nowtime);
return -1;
}
@@ -412,8 +384,7 @@ static void __init print_efi_memmap(void)
p < memmap.map_end;
p += memmap.desc_size, i++) {
md = p;
- pr_info("mem%02u: type=%u, attr=0x%llx, "
- "range=[0x%016llx-0x%016llx) (%lluMB)\n",
+ pr_info("mem%02u: type=%u, attr=0x%llx, range=[0x%016llx-0x%016llx) (%lluMB)\n",
i, md->type, md->attribute, md->phys_addr,
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
(md->num_pages >> (20 - EFI_PAGE_SHIFT)));
@@ -445,9 +416,8 @@ void __init efi_reserve_boot_services(void)
memblock_is_region_reserved(start, size)) {
/* Could not reserve, skip it */
md->num_pages = 0;
- memblock_dbg("Could not reserve boot range "
- "[0x%010llx-0x%010llx]\n",
- start, start+size-1);
+ memblock_dbg("Could not reserve boot range [0x%010llx-0x%010llx]\n",
+ start, start+size-1);
} else
memblock_reserve(start, size);
}
@@ -455,7 +425,7 @@ void __init efi_reserve_boot_services(void)
void __init efi_unmap_memmap(void)
{
- clear_bit(EFI_MEMMAP, &x86_efi_facility);
+ clear_bit(EFI_MEMMAP, &efi.flags);
if (memmap.map) {
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
memmap.map = NULL;
@@ -466,9 +436,6 @@ void __init efi_free_boot_services(void)
{
void *p;
- if (!efi_is_native())
- return;
-
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
efi_memory_desc_t *md = p;
unsigned long long start = md->phys_addr;
@@ -583,45 +550,82 @@ static int __init efi_systab_init(void *phys)
return -EINVAL;
}
if ((efi.systab->hdr.revision >> 16) == 0)
- pr_err("Warning: System table version "
- "%d.%02d, expected 1.00 or greater!\n",
+ pr_err("Warning: System table version %d.%02d, expected 1.00 or greater!\n",
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff);
+ set_bit(EFI_SYSTEM_TABLES, &efi.flags);
+
return 0;
}
-static int __init efi_runtime_init(void)
+static int __init efi_runtime_init32(void)
{
- efi_runtime_services_t *runtime;
+ efi_runtime_services_32_t *runtime;
+
+ runtime = early_ioremap((unsigned long)efi.systab->runtime,
+ sizeof(efi_runtime_services_32_t));
+ if (!runtime) {
+ pr_err("Could not map the runtime service table!\n");
+ return -ENOMEM;
+ }
/*
- * Check out the runtime services table. We need to map
- * the runtime services table so that we can grab the physical
- * address of several of the EFI runtime functions, needed to
- * set the firmware into virtual mode.
+ * We will only need *early* access to the following two
+ * EFI runtime services before set_virtual_address_map
+ * is invoked.
*/
+ efi_phys.set_virtual_address_map =
+ (efi_set_virtual_address_map_t *)
+ (unsigned long)runtime->set_virtual_address_map;
+ early_iounmap(runtime, sizeof(efi_runtime_services_32_t));
+
+ return 0;
+}
+
+static int __init efi_runtime_init64(void)
+{
+ efi_runtime_services_64_t *runtime;
+
runtime = early_ioremap((unsigned long)efi.systab->runtime,
- sizeof(efi_runtime_services_t));
+ sizeof(efi_runtime_services_64_t));
if (!runtime) {
pr_err("Could not map the runtime service table!\n");
return -ENOMEM;
}
+
/*
- * We will only need *early* access to the following
- * two EFI runtime services before set_virtual_address_map
+ * We will only need *early* access to the following two
+ * EFI runtime services before set_virtual_address_map
* is invoked.
*/
- efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
efi_phys.set_virtual_address_map =
- (efi_set_virtual_address_map_t *)
- runtime->set_virtual_address_map;
+ (efi_set_virtual_address_map_t *)
+ (unsigned long)runtime->set_virtual_address_map;
+ early_iounmap(runtime, sizeof(efi_runtime_services_64_t));
+
+ return 0;
+}
+
+static int __init efi_runtime_init(void)
+{
+ int rv;
+
/*
- * Make efi_get_time can be called before entering
- * virtual mode.
+ * Check out the runtime services table. We need to map
+ * the runtime services table so that we can grab the physical
+ * address of several of the EFI runtime functions, needed to
+ * set the firmware into virtual mode.
*/
- efi.get_time = phys_efi_get_time;
- early_iounmap(runtime, sizeof(efi_runtime_services_t));
+ if (efi_enabled(EFI_64BIT))
+ rv = efi_runtime_init64();
+ else
+ rv = efi_runtime_init32();
+
+ if (rv)
+ return rv;
+
+ set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
return 0;
}
@@ -640,6 +644,8 @@ static int __init efi_memmap_init(void)
if (add_efi_memmap)
do_add_efi_memmap();
+ set_bit(EFI_MEMMAP, &efi.flags);
+
return 0;
}
@@ -722,7 +728,7 @@ void __init efi_init(void)
if (efi_systab_init(efi_phys.systab))
return;
- set_bit(EFI_SYSTEM_TABLES, &x86_efi_facility);
+ set_bit(EFI_SYSTEM_TABLES, &efi.flags);
efi.config_table = (unsigned long)efi.systab->tables;
efi.fw_vendor = (unsigned long)efi.systab->fw_vendor;
@@ -750,24 +756,21 @@ void __init efi_init(void)
if (efi_config_init(arch_tables))
return;
- set_bit(EFI_CONFIG_TABLES, &x86_efi_facility);
-
/*
* Note: We currently don't support runtime services on an EFI
* that doesn't match the kernel 32/64-bit mode.
*/
- if (!efi_is_native())
+ if (!efi_runtime_supported())
pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
else {
if (disable_runtime || efi_runtime_init())
return;
- set_bit(EFI_RUNTIME_SERVICES, &x86_efi_facility);
}
if (efi_memmap_init())
return;
- set_bit(EFI_MEMMAP, &x86_efi_facility);
+ set_bit(EFI_MEMMAP, &efi.flags);
print_efi_memmap();
}
@@ -792,7 +795,7 @@ void __init efi_set_executable(efi_memory_desc_t *md, bool executable)
set_memory_nx(addr, npages);
}
-static void __init runtime_code_page_mkexec(void)
+void __init runtime_code_page_mkexec(void)
{
efi_memory_desc_t *md;
void *p;
@@ -844,6 +847,22 @@ void __init old_map_region(efi_memory_desc_t *md)
(unsigned long long)md->phys_addr);
}
+static void native_runtime_setup(void)
+{
+ efi.get_time = virt_efi_get_time;
+ efi.set_time = virt_efi_set_time;
+ efi.get_wakeup_time = virt_efi_get_wakeup_time;
+ efi.set_wakeup_time = virt_efi_set_wakeup_time;
+ efi.get_variable = virt_efi_get_variable;
+ efi.get_next_variable = virt_efi_get_next_variable;
+ efi.set_variable = virt_efi_set_variable;
+ efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
+ efi.reset_system = virt_efi_reset_system;
+ efi.query_variable_info = virt_efi_query_variable_info;
+ efi.update_capsule = virt_efi_update_capsule;
+ efi.query_capsule_caps = virt_efi_query_capsule_caps;
+}
+
/* Merge contiguous regions of the same type and attribute */
static void __init efi_merge_regions(void)
{
@@ -891,12 +910,16 @@ static void __init get_systab_virt_addr(efi_memory_desc_t *md)
}
}
-static int __init save_runtime_map(void)
+static void __init save_runtime_map(void)
{
+#ifdef CONFIG_KEXEC
efi_memory_desc_t *md;
void *tmp, *p, *q = NULL;
int count = 0;
+ if (efi_enabled(EFI_OLD_MEMMAP))
+ return;
+
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
md = p;
@@ -914,38 +937,44 @@ static int __init save_runtime_map(void)
}
efi_runtime_map_setup(q, count, memmap.desc_size);
+ return;
- return 0;
out:
kfree(q);
- return -ENOMEM;
+ pr_err("Error saving runtime map, efi runtime on kexec non-functional!!\n");
+#endif
}
-/*
- * Map efi regions which were passed via setup_data. The virt_addr is a fixed
- * addr which was used in first kernel of a kexec boot.
- */
-static void __init efi_map_regions_fixed(void)
+static void *realloc_pages(void *old_memmap, int old_shift)
{
- void *p;
- efi_memory_desc_t *md;
+ void *ret;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
- efi_map_region_fixed(md); /* FIXME: add error handling */
- get_systab_virt_addr(md);
- }
+ ret = (void *)__get_free_pages(GFP_KERNEL, old_shift + 1);
+ if (!ret)
+ goto out;
+ /*
+ * A first-time allocation doesn't have anything to copy.
+ */
+ if (!old_memmap)
+ return ret;
+
+ memcpy(ret, old_memmap, PAGE_SIZE << old_shift);
+
+out:
+ free_pages((unsigned long)old_memmap, old_shift);
+ return ret;
}
/*
- * Map efi memory ranges for runtime serivce and update new_memmap with virtual
- * addresses.
+ * Map the efi memory ranges of the runtime services and update new_mmap with
+ * virtual addresses.
*/
-static void * __init efi_map_regions(int *count)
+static void * __init efi_map_regions(int *count, int *pg_shift)
{
+ void *p, *new_memmap = NULL;
+ unsigned long left = 0;
efi_memory_desc_t *md;
- void *p, *tmp, *new_memmap = NULL;
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
md = p;
@@ -960,20 +989,80 @@ static void * __init efi_map_regions(int *count)
efi_map_region(md);
get_systab_virt_addr(md);
- tmp = krealloc(new_memmap, (*count + 1) * memmap.desc_size,
- GFP_KERNEL);
- if (!tmp)
- goto out;
- new_memmap = tmp;
+ if (left < memmap.desc_size) {
+ new_memmap = realloc_pages(new_memmap, *pg_shift);
+ if (!new_memmap)
+ return NULL;
+
+ left += PAGE_SIZE << *pg_shift;
+ (*pg_shift)++;
+ }
+
memcpy(new_memmap + (*count * memmap.desc_size), md,
memmap.desc_size);
+
+ left -= memmap.desc_size;
(*count)++;
}
return new_memmap;
-out:
- kfree(new_memmap);
- return NULL;
+}
+
+static void __init kexec_enter_virtual_mode(void)
+{
+#ifdef CONFIG_KEXEC
+ efi_memory_desc_t *md;
+ void *p;
+
+ efi.systab = NULL;
+
+ /*
+ * We don't do virtual mode, since we don't do runtime services, on
+ * non-native EFI
+ */
+ if (!efi_is_native()) {
+ efi_unmap_memmap();
+ return;
+ }
+
+ /*
+ * Map efi regions which were passed via setup_data. The virt_addr is a
+ * fixed addr which was used in first kernel of a kexec boot.
+ */
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
+ efi_map_region_fixed(md); /* FIXME: add error handling */
+ get_systab_virt_addr(md);
+ }
+
+ save_runtime_map();
+
+ BUG_ON(!efi.systab);
+
+ efi_sync_low_kernel_mappings();
+
+ /*
+ * Now that EFI is in virtual mode, update the function
+ * pointers in the runtime service table to the new virtual addresses.
+ *
+ * Call EFI services through wrapper functions.
+ */
+ efi.runtime_version = efi_systab.hdr.revision;
+
+ native_runtime_setup();
+
+ efi.set_virtual_address_map = NULL;
+
+ if (efi_enabled(EFI_OLD_MEMMAP) && (__supported_pte_mask & _PAGE_NX))
+ runtime_code_page_mkexec();
+
+ /* clean DUMMY object */
+ efi.set_variable(efi_dummy_name, &EFI_DUMMY_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS,
+ 0, NULL);
+#endif
}
/*
@@ -995,57 +1084,53 @@ out:
*
* Specially for kexec boot, efi runtime maps in previous kernel should
* be passed in via setup_data. In that case runtime ranges will be mapped
- * to the same virtual addresses as the first kernel.
+ * to the same virtual addresses as the first kernel, see
+ * kexec_enter_virtual_mode().
*/
-void __init efi_enter_virtual_mode(void)
+static void __init __efi_enter_virtual_mode(void)
{
- efi_status_t status;
+ int count = 0, pg_shift = 0;
void *new_memmap = NULL;
- int err, count = 0;
+ efi_status_t status;
efi.systab = NULL;
- /*
- * We don't do virtual mode, since we don't do runtime services, on
- * non-native EFI
- */
- if (!efi_is_native()) {
- efi_unmap_memmap();
+ efi_merge_regions();
+ new_memmap = efi_map_regions(&count, &pg_shift);
+ if (!new_memmap) {
+ pr_err("Error reallocating memory, EFI runtime non-functional!\n");
return;
}
- if (efi_setup) {
- efi_map_regions_fixed();
- } else {
- efi_merge_regions();
- new_memmap = efi_map_regions(&count);
- if (!new_memmap) {
- pr_err("Error reallocating memory, EFI runtime non-functional!\n");
- return;
- }
- }
-
- err = save_runtime_map();
- if (err)
- pr_err("Error saving runtime map, efi runtime on kexec non-functional!!\n");
+ save_runtime_map();
BUG_ON(!efi.systab);
- efi_setup_page_tables();
+ if (efi_setup_page_tables(__pa(new_memmap), 1 << pg_shift))
+ return;
+
efi_sync_low_kernel_mappings();
+ efi_dump_pagetable();
- if (!efi_setup) {
+ if (efi_is_native()) {
status = phys_efi_set_virtual_address_map(
- memmap.desc_size * count,
- memmap.desc_size,
- memmap.desc_version,
- (efi_memory_desc_t *)__pa(new_memmap));
-
- if (status != EFI_SUCCESS) {
- pr_alert("Unable to switch EFI into virtual mode (status=%lx)!\n",
- status);
- panic("EFI call to SetVirtualAddressMap() failed!");
- }
+ memmap.desc_size * count,
+ memmap.desc_size,
+ memmap.desc_version,
+ (efi_memory_desc_t *)__pa(new_memmap));
+ } else {
+ status = efi_thunk_set_virtual_address_map(
+ efi_phys.set_virtual_address_map,
+ memmap.desc_size * count,
+ memmap.desc_size,
+ memmap.desc_version,
+ (efi_memory_desc_t *)__pa(new_memmap));
+ }
+
+ if (status != EFI_SUCCESS) {
+ pr_alert("Unable to switch EFI into virtual mode (status=%lx)!\n",
+ status);
+ panic("EFI call to SetVirtualAddressMap() failed!");
}
/*
@@ -1055,24 +1140,43 @@ void __init efi_enter_virtual_mode(void)
* Call EFI services through wrapper functions.
*/
efi.runtime_version = efi_systab.hdr.revision;
- efi.get_time = virt_efi_get_time;
- efi.set_time = virt_efi_set_time;
- efi.get_wakeup_time = virt_efi_get_wakeup_time;
- efi.set_wakeup_time = virt_efi_set_wakeup_time;
- efi.get_variable = virt_efi_get_variable;
- efi.get_next_variable = virt_efi_get_next_variable;
- efi.set_variable = virt_efi_set_variable;
- efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
- efi.reset_system = virt_efi_reset_system;
+
+ if (efi_is_native())
+ native_runtime_setup();
+ else
+ efi_thunk_runtime_setup();
+
efi.set_virtual_address_map = NULL;
- efi.query_variable_info = virt_efi_query_variable_info;
- efi.update_capsule = virt_efi_update_capsule;
- efi.query_capsule_caps = virt_efi_query_capsule_caps;
- if (efi_enabled(EFI_OLD_MEMMAP) && (__supported_pte_mask & _PAGE_NX))
- runtime_code_page_mkexec();
+ efi_runtime_mkexec();
- kfree(new_memmap);
+ /*
+ * We mapped the descriptor array into the EFI pagetable above but we're
+ * not unmapping it here. Here's why:
+ *
+ * We're copying select PGDs from the kernel page table to the EFI page
+ * table and when we do so and make changes to those PGDs like unmapping
+ * stuff from them, those changes appear in the kernel page table and we
+ * go boom.
+ *
+ * From setup_real_mode():
+ *
+ * ...
+ * trampoline_pgd[0] = init_level4_pgt[pgd_index(__PAGE_OFFSET)].pgd;
+ *
+ * In this particular case, our allocation is in PGD 0 of the EFI page
+ * table but we've copied that PGD from PGD[272] of the EFI page table:
+ *
+ * pgd_index(__PAGE_OFFSET = 0xffff880000000000) = 272
+ *
+ * where the direct memory mapping in kernel space is.
+ *
+ * new_memmap's VA comes from that direct mapping and thus clearing it,
+ * it would get cleared in the kernel page table too.
+ *
+ * efi_cleanup_page_tables(__pa(new_memmap), 1 << pg_shift);
+ */
+ free_pages((unsigned long)new_memmap, pg_shift);
/* clean DUMMY object */
efi.set_variable(efi_dummy_name, &EFI_DUMMY_GUID,
@@ -1082,6 +1186,14 @@ void __init efi_enter_virtual_mode(void)
0, NULL);
}
+void __init efi_enter_virtual_mode(void)
+{
+ if (efi_setup)
+ kexec_enter_virtual_mode();
+ else
+ __efi_enter_virtual_mode();
+}
+
/*
* Convenience functions to obtain memory types and attributes
*/
@@ -1119,9 +1231,8 @@ u64 efi_mem_attributes(unsigned long phys_addr)
}
/*
- * Some firmware has serious problems when using more than 50% of the EFI
- * variable store, i.e. it triggers bugs that can brick machines. Ensure that
- * we never use more than this safe limit.
+ * Some firmware implementations refuse to boot if there's insufficient space
+ * in the variable store. Ensure that we never use more than a safe limit.
*
* Return EFI_SUCCESS if it is safe to write 'size' bytes to the variable
* store.
@@ -1140,10 +1251,9 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
return status;
/*
- * Some firmware implementations refuse to boot if there's insufficient
- * space in the variable store. We account for that by refusing the
- * write if permitting it would reduce the available space to under
- * 5KB. This figure was provided by Samsung, so should be safe.
+ * We account for that by refusing the write if permitting it would
+ * reduce the available space to under 5KB. This figure was provided by
+ * Samsung, so should be safe.
*/
if ((remaining_size - size < EFI_MIN_RESERVE) &&
!efi_no_storage_paranoia) {
@@ -1206,8 +1316,27 @@ static int __init parse_efi_cmdline(char *str)
str++;
if (!strncmp(str, "old_map", 7))
- set_bit(EFI_OLD_MEMMAP, &x86_efi_facility);
+ set_bit(EFI_OLD_MEMMAP, &efi.flags);
return 0;
}
early_param("efi", parse_efi_cmdline);
+
+void __init efi_apply_memmap_quirks(void)
+{
+ /*
+ * Once setup is done earlier, unmap the EFI memory map on mismatched
+ * firmware/kernel architectures since there is no support for runtime
+ * services.
+ */
+ if (!efi_runtime_supported()) {
+ pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
+ efi_unmap_memmap();
+ }
+
+ /*
+ * UV doesn't support the new EFI pagetable mapping yet.
+ */
+ if (is_uv_system())
+ set_bit(EFI_OLD_MEMMAP, &efi.flags);
+}
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index 249b183cf41..9ee3491e31f 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -40,7 +40,12 @@
static unsigned long efi_rt_eflags;
void efi_sync_low_kernel_mappings(void) {}
-void efi_setup_page_tables(void) {}
+void __init efi_dump_pagetable(void) {}
+int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+{
+ return 0;
+}
+void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages) {}
void __init efi_map_region(efi_memory_desc_t *md)
{
@@ -77,3 +82,9 @@ void efi_call_phys_epilog(void)
local_irq_restore(efi_rt_eflags);
}
+
+void __init efi_runtime_mkexec(void)
+{
+ if (__supported_pte_mask & _PAGE_NX)
+ runtime_code_page_mkexec();
+}
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 6284f158a47..290d397e1dd 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -39,6 +39,7 @@
#include <asm/cacheflush.h>
#include <asm/fixmap.h>
#include <asm/realmode.h>
+#include <asm/time.h>
static pgd_t *save_pgd __initdata;
static unsigned long efi_flags __initdata;
@@ -58,7 +59,8 @@ struct efi_scratch {
u64 prev_cr3;
pgd_t *efi_pgt;
bool use_pgd;
-};
+ u64 phys_stack;
+} __packed;
static void __init early_code_mapping_set_exec(int executable)
{
@@ -137,12 +139,64 @@ void efi_sync_low_kernel_mappings(void)
sizeof(pgd_t) * num_pgds);
}
-void efi_setup_page_tables(void)
+int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
{
+ unsigned long text;
+ struct page *page;
+ unsigned npages;
+ pgd_t *pgd;
+
+ if (efi_enabled(EFI_OLD_MEMMAP))
+ return 0;
+
efi_scratch.efi_pgt = (pgd_t *)(unsigned long)real_mode_header->trampoline_pgd;
+ pgd = __va(efi_scratch.efi_pgt);
- if (!efi_enabled(EFI_OLD_MEMMAP))
- efi_scratch.use_pgd = true;
+ /*
+ * It can happen that the physical address of new_memmap lands in memory
+ * which is not mapped in the EFI page table. Therefore we need to go
+ * and ident-map those pages containing the map before calling
+ * phys_efi_set_virtual_address_map().
+ */
+ if (kernel_map_pages_in_pgd(pgd, pa_memmap, pa_memmap, num_pages, _PAGE_NX)) {
+ pr_err("Error ident-mapping new memmap (0x%lx)!\n", pa_memmap);
+ return 1;
+ }
+
+ efi_scratch.use_pgd = true;
+
+ /*
+ * When making calls to the firmware everything needs to be 1:1
+ * mapped and addressable with 32-bit pointers. Map the kernel
+ * text and allocate a new stack because we can't rely on the
+ * stack pointer being < 4GB.
+ */
+ if (!IS_ENABLED(CONFIG_EFI_MIXED))
+ return 0;
+
+ page = alloc_page(GFP_KERNEL|__GFP_DMA32);
+ if (!page)
+ panic("Unable to allocate EFI runtime stack < 4GB\n");
+
+ efi_scratch.phys_stack = virt_to_phys(page_address(page));
+ efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */
+
+ npages = (_end - _text) >> PAGE_SHIFT;
+ text = __pa(_text);
+
+ if (kernel_map_pages_in_pgd(pgd, text >> PAGE_SHIFT, text, npages, 0)) {
+ pr_err("Failed to map kernel text 1:1\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+{
+ pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd);
+
+ kernel_unmap_pages_in_pgd(pgd, pa_memmap, num_pages);
}
static void __init __map_region(efi_memory_desc_t *md, u64 va)
@@ -173,6 +227,16 @@ void __init efi_map_region(efi_memory_desc_t *md)
*/
__map_region(md, md->phys_addr);
+ /*
+ * Enforce the 1:1 mapping as the default virtual address when
+ * booting in EFI mixed mode, because even though we may be
+ * running a 64-bit kernel, the firmware may only be 32-bit.
+ */
+ if (!efi_is_native () && IS_ENABLED(CONFIG_EFI_MIXED)) {
+ md->virt_addr = md->phys_addr;
+ return;
+ }
+
efi_va -= size;
/* Is PA 2M-aligned? */
@@ -233,3 +297,308 @@ void __init parse_efi_setup(u64 phys_addr, u32 data_len)
{
efi_setup = phys_addr + sizeof(struct setup_data);
}
+
+void __init efi_runtime_mkexec(void)
+{
+ if (!efi_enabled(EFI_OLD_MEMMAP))
+ return;
+
+ if (__supported_pte_mask & _PAGE_NX)
+ runtime_code_page_mkexec();
+}
+
+void __init efi_dump_pagetable(void)
+{
+#ifdef CONFIG_EFI_PGT_DUMP
+ pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd);
+
+ ptdump_walk_pgd_level(NULL, pgd);
+#endif
+}
+
+#ifdef CONFIG_EFI_MIXED
+extern efi_status_t efi64_thunk(u32, ...);
+
+#define runtime_service32(func) \
+({ \
+ u32 table = (u32)(unsigned long)efi.systab; \
+ u32 *rt, *___f; \
+ \
+ rt = (u32 *)(table + offsetof(efi_system_table_32_t, runtime)); \
+ ___f = (u32 *)(*rt + offsetof(efi_runtime_services_32_t, func)); \
+ *___f; \
+})
+
+/*
+ * Switch to the EFI page tables early so that we can access the 1:1
+ * runtime services mappings which are not mapped in any other page
+ * tables. This function must be called before runtime_service32().
+ *
+ * Also, disable interrupts because the IDT points to 64-bit handlers,
+ * which aren't going to function correctly when we switch to 32-bit.
+ */
+#define efi_thunk(f, ...) \
+({ \
+ efi_status_t __s; \
+ unsigned long flags; \
+ u32 func; \
+ \
+ efi_sync_low_kernel_mappings(); \
+ local_irq_save(flags); \
+ \
+ efi_scratch.prev_cr3 = read_cr3(); \
+ write_cr3((unsigned long)efi_scratch.efi_pgt); \
+ __flush_tlb_all(); \
+ \
+ func = runtime_service32(f); \
+ __s = efi64_thunk(func, __VA_ARGS__); \
+ \
+ write_cr3(efi_scratch.prev_cr3); \
+ __flush_tlb_all(); \
+ local_irq_restore(flags); \
+ \
+ __s; \
+})
+
+efi_status_t efi_thunk_set_virtual_address_map(
+ void *phys_set_virtual_address_map,
+ unsigned long memory_map_size,
+ unsigned long descriptor_size,
+ u32 descriptor_version,
+ efi_memory_desc_t *virtual_map)
+{
+ efi_status_t status;
+ unsigned long flags;
+ u32 func;
+
+ efi_sync_low_kernel_mappings();
+ local_irq_save(flags);
+
+ efi_scratch.prev_cr3 = read_cr3();
+ write_cr3((unsigned long)efi_scratch.efi_pgt);
+ __flush_tlb_all();
+
+ func = (u32)(unsigned long)phys_set_virtual_address_map;
+ status = efi64_thunk(func, memory_map_size, descriptor_size,
+ descriptor_version, virtual_map);
+
+ write_cr3(efi_scratch.prev_cr3);
+ __flush_tlb_all();
+ local_irq_restore(flags);
+
+ return status;
+}
+
+static efi_status_t efi_thunk_get_time(efi_time_t *tm, efi_time_cap_t *tc)
+{
+ efi_status_t status;
+ u32 phys_tm, phys_tc;
+
+ spin_lock(&rtc_lock);
+
+ phys_tm = virt_to_phys(tm);
+ phys_tc = virt_to_phys(tc);
+
+ status = efi_thunk(get_time, phys_tm, phys_tc);
+
+ spin_unlock(&rtc_lock);
+
+ return status;
+}
+
+static efi_status_t efi_thunk_set_time(efi_time_t *tm)
+{
+ efi_status_t status;
+ u32 phys_tm;
+
+ spin_lock(&rtc_lock);
+
+ phys_tm = virt_to_phys(tm);
+
+ status = efi_thunk(set_time, phys_tm);
+
+ spin_unlock(&rtc_lock);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
+ efi_time_t *tm)
+{
+ efi_status_t status;
+ u32 phys_enabled, phys_pending, phys_tm;
+
+ spin_lock(&rtc_lock);
+
+ phys_enabled = virt_to_phys(enabled);
+ phys_pending = virt_to_phys(pending);
+ phys_tm = virt_to_phys(tm);
+
+ status = efi_thunk(get_wakeup_time, phys_enabled,
+ phys_pending, phys_tm);
+
+ spin_unlock(&rtc_lock);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
+{
+ efi_status_t status;
+ u32 phys_tm;
+
+ spin_lock(&rtc_lock);
+
+ phys_tm = virt_to_phys(tm);
+
+ status = efi_thunk(set_wakeup_time, enabled, phys_tm);
+
+ spin_unlock(&rtc_lock);
+
+ return status;
+}
+
+
+static efi_status_t
+efi_thunk_get_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 *attr, unsigned long *data_size, void *data)
+{
+ efi_status_t status;
+ u32 phys_name, phys_vendor, phys_attr;
+ u32 phys_data_size, phys_data;
+
+ phys_data_size = virt_to_phys(data_size);
+ phys_vendor = virt_to_phys(vendor);
+ phys_name = virt_to_phys(name);
+ phys_attr = virt_to_phys(attr);
+ phys_data = virt_to_phys(data);
+
+ status = efi_thunk(get_variable, phys_name, phys_vendor,
+ phys_attr, phys_data_size, phys_data);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_set_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size, void *data)
+{
+ u32 phys_name, phys_vendor, phys_data;
+ efi_status_t status;
+
+ phys_name = virt_to_phys(name);
+ phys_vendor = virt_to_phys(vendor);
+ phys_data = virt_to_phys(data);
+
+ /* If data_size is > sizeof(u32) we've got problems */
+ status = efi_thunk(set_variable, phys_name, phys_vendor,
+ attr, data_size, phys_data);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_get_next_variable(unsigned long *name_size,
+ efi_char16_t *name,
+ efi_guid_t *vendor)
+{
+ efi_status_t status;
+ u32 phys_name_size, phys_name, phys_vendor;
+
+ phys_name_size = virt_to_phys(name_size);
+ phys_vendor = virt_to_phys(vendor);
+ phys_name = virt_to_phys(name);
+
+ status = efi_thunk(get_next_variable, phys_name_size,
+ phys_name, phys_vendor);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_get_next_high_mono_count(u32 *count)
+{
+ efi_status_t status;
+ u32 phys_count;
+
+ phys_count = virt_to_phys(count);
+ status = efi_thunk(get_next_high_mono_count, phys_count);
+
+ return status;
+}
+
+static void
+efi_thunk_reset_system(int reset_type, efi_status_t status,
+ unsigned long data_size, efi_char16_t *data)
+{
+ u32 phys_data;
+
+ phys_data = virt_to_phys(data);
+
+ efi_thunk(reset_system, reset_type, status, data_size, phys_data);
+}
+
+static efi_status_t
+efi_thunk_update_capsule(efi_capsule_header_t **capsules,
+ unsigned long count, unsigned long sg_list)
+{
+ /*
+ * To properly support this function we would need to repackage
+ * 'capsules' because the firmware doesn't understand 64-bit
+ * pointers.
+ */
+ return EFI_UNSUPPORTED;
+}
+
+static efi_status_t
+efi_thunk_query_variable_info(u32 attr, u64 *storage_space,
+ u64 *remaining_space,
+ u64 *max_variable_size)
+{
+ efi_status_t status;
+ u32 phys_storage, phys_remaining, phys_max;
+
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ phys_storage = virt_to_phys(storage_space);
+ phys_remaining = virt_to_phys(remaining_space);
+ phys_max = virt_to_phys(max_variable_size);
+
+ status = efi_thunk(query_variable_info, attr, phys_storage,
+ phys_remaining, phys_max);
+
+ return status;
+}
+
+static efi_status_t
+efi_thunk_query_capsule_caps(efi_capsule_header_t **capsules,
+ unsigned long count, u64 *max_size,
+ int *reset_type)
+{
+ /*
+ * To properly support this function we would need to repackage
+ * 'capsules' because the firmware doesn't understand 64-bit
+ * pointers.
+ */
+ return EFI_UNSUPPORTED;
+}
+
+void efi_thunk_runtime_setup(void)
+{
+ efi.get_time = efi_thunk_get_time;
+ efi.set_time = efi_thunk_set_time;
+ efi.get_wakeup_time = efi_thunk_get_wakeup_time;
+ efi.set_wakeup_time = efi_thunk_set_wakeup_time;
+ efi.get_variable = efi_thunk_get_variable;
+ efi.get_next_variable = efi_thunk_get_next_variable;
+ efi.set_variable = efi_thunk_set_variable;
+ efi.get_next_high_mono_count = efi_thunk_get_next_high_mono_count;
+ efi.reset_system = efi_thunk_reset_system;
+ efi.query_variable_info = efi_thunk_query_variable_info;
+ efi.update_capsule = efi_thunk_update_capsule;
+ efi.query_capsule_caps = efi_thunk_query_capsule_caps;
+}
+#endif /* CONFIG_EFI_MIXED */
diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S
index 88073b14029..5fcda727255 100644
--- a/arch/x86/platform/efi/efi_stub_64.S
+++ b/arch/x86/platform/efi/efi_stub_64.S
@@ -7,6 +7,10 @@
*/
#include <linux/linkage.h>
+#include <asm/segment.h>
+#include <asm/msr.h>
+#include <asm/processor-flags.h>
+#include <asm/page_types.h>
#define SAVE_XMM \
mov %rsp, %rax; \
@@ -69,84 +73,7 @@
2:
.endm
-ENTRY(efi_call0)
- SAVE_XMM
- subq $32, %rsp
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $32, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call0)
-
-ENTRY(efi_call1)
- SAVE_XMM
- subq $32, %rsp
- mov %rsi, %rcx
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $32, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call1)
-
-ENTRY(efi_call2)
- SAVE_XMM
- subq $32, %rsp
- mov %rsi, %rcx
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $32, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call2)
-
-ENTRY(efi_call3)
- SAVE_XMM
- subq $32, %rsp
- mov %rcx, %r8
- mov %rsi, %rcx
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $32, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call3)
-
-ENTRY(efi_call4)
- SAVE_XMM
- subq $32, %rsp
- mov %r8, %r9
- mov %rcx, %r8
- mov %rsi, %rcx
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $32, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call4)
-
-ENTRY(efi_call5)
- SAVE_XMM
- subq $48, %rsp
- mov %r9, 32(%rsp)
- mov %r8, %r9
- mov %rcx, %r8
- mov %rsi, %rcx
- SWITCH_PGT
- call *%rdi
- RESTORE_PGT
- addq $48, %rsp
- RESTORE_XMM
- ret
-ENDPROC(efi_call5)
-
-ENTRY(efi_call6)
+ENTRY(efi_call)
SAVE_XMM
mov (%rsp), %rax
mov 8(%rax), %rax
@@ -162,9 +89,171 @@ ENTRY(efi_call6)
addq $48, %rsp
RESTORE_XMM
ret
-ENDPROC(efi_call6)
+ENDPROC(efi_call)
+
+#ifdef CONFIG_EFI_MIXED
+
+/*
+ * We run this function from the 1:1 mapping.
+ *
+ * This function must be invoked with a 1:1 mapped stack.
+ */
+ENTRY(__efi64_thunk)
+ movl %ds, %eax
+ push %rax
+ movl %es, %eax
+ push %rax
+ movl %ss, %eax
+ push %rax
+
+ subq $32, %rsp
+ movl %esi, 0x0(%rsp)
+ movl %edx, 0x4(%rsp)
+ movl %ecx, 0x8(%rsp)
+ movq %r8, %rsi
+ movl %esi, 0xc(%rsp)
+ movq %r9, %rsi
+ movl %esi, 0x10(%rsp)
+
+ sgdt save_gdt(%rip)
+
+ leaq 1f(%rip), %rbx
+ movq %rbx, func_rt_ptr(%rip)
+
+ /* Switch to gdt with 32-bit segments */
+ movl 64(%rsp), %eax
+ lgdt (%rax)
+
+ leaq efi_enter32(%rip), %rax
+ pushq $__KERNEL_CS
+ pushq %rax
+ lretq
+
+1: addq $32, %rsp
+
+ lgdt save_gdt(%rip)
+
+ pop %rbx
+ movl %ebx, %ss
+ pop %rbx
+ movl %ebx, %es
+ pop %rbx
+ movl %ebx, %ds
+
+ /*
+ * Convert 32-bit status code into 64-bit.
+ */
+ test %rax, %rax
+ jz 1f
+ movl %eax, %ecx
+ andl $0x0fffffff, %ecx
+ andl $0xf0000000, %eax
+ shl $32, %rax
+ or %rcx, %rax
+1:
+ ret
+ENDPROC(__efi64_thunk)
+
+ENTRY(efi_exit32)
+ movq func_rt_ptr(%rip), %rax
+ push %rax
+ mov %rdi, %rax
+ ret
+ENDPROC(efi_exit32)
+
+ .code32
+/*
+ * EFI service pointer must be in %edi.
+ *
+ * The stack should represent the 32-bit calling convention.
+ */
+ENTRY(efi_enter32)
+ movl $__KERNEL_DS, %eax
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %ss
+
+ /* Reload pgtables */
+ movl %cr3, %eax
+ movl %eax, %cr3
+
+ /* Disable paging */
+ movl %cr0, %eax
+ btrl $X86_CR0_PG_BIT, %eax
+ movl %eax, %cr0
+
+ /* Disable long mode via EFER */
+ movl $MSR_EFER, %ecx
+ rdmsr
+ btrl $_EFER_LME, %eax
+ wrmsr
+
+ call *%edi
+
+ /* We must preserve return value */
+ movl %eax, %edi
+
+ /*
+ * Some firmware will return with interrupts enabled. Be sure to
+ * disable them before we switch GDTs.
+ */
+ cli
+
+ movl 68(%esp), %eax
+ movl %eax, 2(%eax)
+ lgdtl (%eax)
+
+ movl %cr4, %eax
+ btsl $(X86_CR4_PAE_BIT), %eax
+ movl %eax, %cr4
+
+ movl %cr3, %eax
+ movl %eax, %cr3
+
+ movl $MSR_EFER, %ecx
+ rdmsr
+ btsl $_EFER_LME, %eax
+ wrmsr
+
+ xorl %eax, %eax
+ lldt %ax
+
+ movl 72(%esp), %eax
+ pushl $__KERNEL_CS
+ pushl %eax
+
+ /* Enable paging */
+ movl %cr0, %eax
+ btsl $X86_CR0_PG_BIT, %eax
+ movl %eax, %cr0
+ lret
+ENDPROC(efi_enter32)
+
+ .data
+ .balign 8
+ .global efi32_boot_gdt
+efi32_boot_gdt: .word 0
+ .quad 0
+
+save_gdt: .word 0
+ .quad 0
+func_rt_ptr: .quad 0
+
+ .global efi_gdt64
+efi_gdt64:
+ .word efi_gdt64_end - efi_gdt64
+ .long 0 /* Filled out by user */
+ .word 0
+ .quad 0x0000000000000000 /* NULL descriptor */
+ .quad 0x00af9a000000ffff /* __KERNEL_CS */
+ .quad 0x00cf92000000ffff /* __KERNEL_DS */
+ .quad 0x0080890000000000 /* TS descriptor */
+ .quad 0x0000000000000000 /* TS continued */
+efi_gdt64_end:
+#endif /* CONFIG_EFI_MIXED */
.data
ENTRY(efi_scratch)
.fill 3,8,0
.byte 0
+ .quad 0
diff --git a/arch/x86/platform/efi/efi_thunk_64.S b/arch/x86/platform/efi/efi_thunk_64.S
new file mode 100644
index 00000000000..8806fa73e6e
--- /dev/null
+++ b/arch/x86/platform/efi/efi_thunk_64.S
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2014 Intel Corporation; author Matt Fleming
+ */
+
+#include <linux/linkage.h>
+#include <asm/page_types.h>
+
+ .text
+ .code64
+ENTRY(efi64_thunk)
+ push %rbp
+ push %rbx
+
+ /*
+ * Switch to 1:1 mapped 32-bit stack pointer.
+ */
+ movq %rsp, efi_saved_sp(%rip)
+ movq efi_scratch+25(%rip), %rsp
+
+ /*
+ * Calculate the physical address of the kernel text.
+ */
+ movq $__START_KERNEL_map, %rax
+ subq phys_base(%rip), %rax
+
+ /*
+ * Push some physical addresses onto the stack. This is easier
+ * to do now in a code64 section while the assembler can address
+ * 64-bit values. Note that all the addresses on the stack are
+ * 32-bit.
+ */
+ subq $16, %rsp
+ leaq efi_exit32(%rip), %rbx
+ subq %rax, %rbx
+ movl %ebx, 8(%rsp)
+ leaq efi_gdt64(%rip), %rbx
+ subq %rax, %rbx
+ movl %ebx, 2(%ebx)
+ movl %ebx, 4(%rsp)
+ leaq efi_gdt32(%rip), %rbx
+ subq %rax, %rbx
+ movl %ebx, 2(%ebx)
+ movl %ebx, (%rsp)
+
+ leaq __efi64_thunk(%rip), %rbx
+ subq %rax, %rbx
+ call *%rbx
+
+ movq efi_saved_sp(%rip), %rsp
+ pop %rbx
+ pop %rbp
+ retq
+ENDPROC(efi64_thunk)
+
+ .data
+efi_gdt32:
+ .word efi_gdt32_end - efi_gdt32
+ .long 0 /* Filled out above */
+ .word 0
+ .quad 0x0000000000000000 /* NULL descriptor */
+ .quad 0x00cf9a000000ffff /* __KERNEL_CS */
+ .quad 0x00cf93000000ffff /* __KERNEL_DS */
+efi_gdt32_end:
+
+efi_saved_sp: .quad 0
diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index 097e7a7940d..af9307f2cc2 100644
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -20,3 +20,4 @@ obj-$(subst m,y,$(CONFIG_DRM_MEDFIELD)) += platform_tc35876x.o
obj-$(subst m,y,$(CONFIG_SERIAL_MRST_MAX3110)) += platform_max3111.o
# MISC Devices
obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o
+obj-$(subst m,y,$(CONFIG_INTEL_MID_WATCHDOG)) += platform_wdt.o
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
new file mode 100644
index 00000000000..973cf3bfa9f
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
@@ -0,0 +1,72 @@
+/*
+ * platform_wdt.c: Watchdog platform library file
+ *
+ * (C) Copyright 2014 Intel Corporation
+ * Author: David Cohen <david.a.cohen@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/intel-mid_wdt.h>
+#include <asm/intel-mid.h>
+#include <asm/io_apic.h>
+
+#define TANGIER_EXT_TIMER0_MSI 15
+
+static struct platform_device wdt_dev = {
+ .name = "intel_mid_wdt",
+ .id = -1,
+};
+
+static int tangier_probe(struct platform_device *pdev)
+{
+ int ioapic;
+ int irq;
+ struct intel_mid_wdt_pdata *pdata = pdev->dev.platform_data;
+ struct io_apic_irq_attr irq_attr = { 0 };
+
+ if (!pdata)
+ return -EINVAL;
+
+ irq = pdata->irq;
+ ioapic = mp_find_ioapic(irq);
+ if (ioapic >= 0) {
+ int ret;
+ irq_attr.ioapic = ioapic;
+ irq_attr.ioapic_pin = irq;
+ irq_attr.trigger = 1;
+ /* irq_attr.polarity = 0; -> Active high */
+ ret = io_apic_set_pci_routing(NULL, irq, &irq_attr);
+ if (ret)
+ return ret;
+ } else {
+ dev_warn(&pdev->dev, "cannot find interrupt %d in ioapic\n",
+ irq);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct intel_mid_wdt_pdata tangier_pdata = {
+ .irq = TANGIER_EXT_TIMER0_MSI,
+ .probe = tangier_probe,
+};
+
+static int __init register_mid_wdt(void)
+{
+ if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER) {
+ wdt_dev.dev.platform_data = &tangier_pdata;
+ return platform_device_register(&wdt_dev);
+ }
+
+ return -ENODEV;
+}
+
+rootfs_initcall(register_mid_wdt);
diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c b/arch/x86/platform/olpc/olpc-xo1-pm.c
index ff0174dda81..a9acde72d4e 100644
--- a/arch/x86/platform/olpc/olpc-xo1-pm.c
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -75,7 +75,7 @@ static int xo1_power_state_enter(suspend_state_t pm_state)
return 0;
}
-asmlinkage int xo1_do_sleep(u8 sleep_state)
+asmlinkage __visible int xo1_do_sleep(u8 sleep_state)
{
void *pgd_addr = __va(read_cr3());
diff --git a/arch/x86/platform/ts5500/ts5500.c b/arch/x86/platform/ts5500/ts5500.c
index 39febb214e8..9471b9456f2 100644
--- a/arch/x86/platform/ts5500/ts5500.c
+++ b/arch/x86/platform/ts5500/ts5500.c
@@ -88,7 +88,7 @@ struct ts5500_sbc {
static const struct {
const char * const string;
const ssize_t offset;
-} ts5500_signatures[] __initdata = {
+} ts5500_signatures[] __initconst = {
{ "TS-5x00 AMD Elan", 0xb14 },
};
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c
index 766612137a6..1584cbed0dc 100644
--- a/arch/x86/platform/uv/bios_uv.c
+++ b/arch/x86/platform/uv/bios_uv.c
@@ -39,7 +39,7 @@ s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
*/
return BIOS_STATUS_UNIMPLEMENTED;
- ret = efi_call6((void *)__va(tab->function), (u64)which,
+ ret = efi_call((void *)__va(tab->function), (u64)which,
a1, a2, a3, a4, a5);
return ret;
}
diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
index acf7752da95..b233681af4d 100644
--- a/arch/x86/platform/uv/uv_irq.c
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -238,11 +238,9 @@ uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask,
int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
unsigned long mmr_offset, int limit)
{
- int irq, ret;
+ int ret, irq = irq_alloc_hwirq(uv_blade_to_memory_nid(mmr_blade));
- irq = create_irq_nr(NR_IRQS_LEGACY, uv_blade_to_memory_nid(mmr_blade));
-
- if (irq <= 0)
+ if (!irq)
return -EBUSY;
ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset,
@@ -250,7 +248,7 @@ int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
if (ret == irq)
uv_set_irq_2_mmr_info(irq, mmr_offset, mmr_blade);
else
- destroy_irq(irq);
+ irq_free_hwirq(irq);
return ret;
}
@@ -285,6 +283,6 @@ void uv_teardown_irq(unsigned int irq)
n = n->rb_right;
}
spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- destroy_irq(irq);
+ irq_free_hwirq(irq);
}
EXPORT_SYMBOL_GPL(uv_teardown_irq);
diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c
index be27da60dc8..c89c93320c1 100644
--- a/arch/x86/platform/uv/uv_nmi.c
+++ b/arch/x86/platform/uv/uv_nmi.c
@@ -85,7 +85,7 @@ static cpumask_var_t uv_nmi_cpu_mask;
* Default is all stack dumps go to the console and buffer.
* Lower level to send to log buffer only.
*/
-static int uv_nmi_loglevel = 7;
+static int uv_nmi_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
module_param_named(dump_loglevel, uv_nmi_loglevel, int, 0644);
/*
diff --git a/arch/x86/platform/visws/Makefile b/arch/x86/platform/visws/Makefile
deleted file mode 100644
index 91bc17ab2fd..00000000000
--- a/arch/x86/platform/visws/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_X86_VISWS) += visws_quirks.o
diff --git a/arch/x86/platform/visws/visws_quirks.c b/arch/x86/platform/visws/visws_quirks.c
deleted file mode 100644
index 94d8a39332e..00000000000
--- a/arch/x86/platform/visws/visws_quirks.c
+++ /dev/null
@@ -1,608 +0,0 @@
-/*
- * SGI Visual Workstation support and quirks, unmaintained.
- *
- * Split out from setup.c by davej@suse.de
- *
- * Copyright (C) 1999 Bent Hagemark, Ingo Molnar
- *
- * SGI Visual Workstation interrupt controller
- *
- * The Cobalt system ASIC in the Visual Workstation contains a "Cobalt" APIC
- * which serves as the main interrupt controller in the system. Non-legacy
- * hardware in the system uses this controller directly. Legacy devices
- * are connected to the PIIX4 which in turn has its 8259(s) connected to
- * a of the Cobalt APIC entry.
- *
- * 09/02/2000 - Updated for 2.4 by jbarnes@sgi.com
- *
- * 25/11/2002 - Updated for 2.5 by Andrey Panin <pazke@orbita1.ru>
- */
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-
-#include <asm/visws/cobalt.h>
-#include <asm/visws/piix4.h>
-#include <asm/io_apic.h>
-#include <asm/fixmap.h>
-#include <asm/reboot.h>
-#include <asm/setup.h>
-#include <asm/apic.h>
-#include <asm/e820.h>
-#include <asm/time.h>
-#include <asm/io.h>
-
-#include <linux/kernel_stat.h>
-
-#include <asm/i8259.h>
-#include <asm/irq_vectors.h>
-#include <asm/visws/lithium.h>
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/pci_ids.h>
-
-extern int no_broadcast;
-
-char visws_board_type = -1;
-char visws_board_rev = -1;
-
-static void __init visws_time_init(void)
-{
- printk(KERN_INFO "Starting Cobalt Timer system clock\n");
-
- /* Set the countdown value */
- co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
-
- /* Start the timer */
- co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) | CO_CTRL_TIMERUN);
-
- /* Enable (unmask) the timer interrupt */
- co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) & ~CO_CTRL_TIMEMASK);
-
- setup_default_timer_irq();
-}
-
-/* Replaces the default init_ISA_irqs in the generic setup */
-static void __init visws_pre_intr_init(void);
-
-/* Quirk for machine specific memory setup. */
-
-#define MB (1024 * 1024)
-
-unsigned long sgivwfb_mem_phys;
-unsigned long sgivwfb_mem_size;
-EXPORT_SYMBOL(sgivwfb_mem_phys);
-EXPORT_SYMBOL(sgivwfb_mem_size);
-
-long long mem_size __initdata = 0;
-
-static char * __init visws_memory_setup(void)
-{
- long long gfx_mem_size = 8 * MB;
-
- mem_size = boot_params.alt_mem_k;
-
- if (!mem_size) {
- printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
- mem_size = 128 * MB;
- }
-
- /*
- * this hardcodes the graphics memory to 8 MB
- * it really should be sized dynamically (or at least
- * set as a boot param)
- */
- if (!sgivwfb_mem_size) {
- printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
- sgivwfb_mem_size = 8 * MB;
- }
-
- /*
- * Trim to nearest MB
- */
- sgivwfb_mem_size &= ~((1 << 20) - 1);
- sgivwfb_mem_phys = mem_size - gfx_mem_size;
-
- e820_add_region(0, LOWMEMSIZE(), E820_RAM);
- e820_add_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
- e820_add_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
-
- return "PROM";
-}
-
-static void visws_machine_emergency_restart(void)
-{
- /*
- * Visual Workstations restart after this
- * register is poked on the PIIX4
- */
- outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
-}
-
-static void visws_machine_power_off(void)
-{
- unsigned short pm_status;
-/* extern unsigned int pci_bus0; */
-
- while ((pm_status = inw(PMSTS_PORT)) & 0x100)
- outw(pm_status, PMSTS_PORT);
-
- outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);
-
- mdelay(10);
-
-#define PCI_CONF1_ADDRESS(bus, devfn, reg) \
- (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
-
-/* outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8); */
- outl(PIIX_SPECIAL_STOP, 0xCFC);
-}
-
-static void __init visws_get_smp_config(unsigned int early)
-{
-}
-
-/*
- * The Visual Workstation is Intel MP compliant in the hardware
- * sense, but it doesn't have a BIOS(-configuration table).
- * No problem for Linux.
- */
-
-static void __init MP_processor_info(struct mpc_cpu *m)
-{
- int ver, logical_apicid;
- physid_mask_t apic_cpus;
-
- if (!(m->cpuflag & CPU_ENABLED))
- return;
-
- logical_apicid = m->apicid;
- printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
- m->cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
- m->apicid, (m->cpufeature & CPU_FAMILY_MASK) >> 8,
- (m->cpufeature & CPU_MODEL_MASK) >> 4, m->apicver);
-
- if (m->cpuflag & CPU_BOOTPROCESSOR)
- boot_cpu_physical_apicid = m->apicid;
-
- ver = m->apicver;
- if ((ver >= 0x14 && m->apicid >= 0xff) || m->apicid >= 0xf) {
- printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
- m->apicid, MAX_LOCAL_APIC);
- return;
- }
-
- apic->apicid_to_cpu_present(m->apicid, &apic_cpus);
- physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
- /*
- * Validate version
- */
- if (ver == 0x0) {
- printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
- "fixing up to 0x10. (tell your hw vendor)\n",
- m->apicid);
- ver = 0x10;
- }
- apic_version[m->apicid] = ver;
-}
-
-static void __init visws_find_smp_config(void)
-{
- struct mpc_cpu *mp = phys_to_virt(CO_CPU_TAB_PHYS);
- unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
-
- if (ncpus > CO_CPU_MAX) {
- printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
- ncpus, mp);
-
- ncpus = CO_CPU_MAX;
- }
-
- if (ncpus > setup_max_cpus)
- ncpus = setup_max_cpus;
-
-#ifdef CONFIG_X86_LOCAL_APIC
- smp_found_config = 1;
-#endif
- while (ncpus--)
- MP_processor_info(mp++);
-
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-}
-
-static void visws_trap_init(void);
-
-void __init visws_early_detect(void)
-{
- int raw;
-
- visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
- >> PIIX_GPI_BD_SHIFT;
-
- if (visws_board_type < 0)
- return;
-
- /*
- * Override the default platform setup functions
- */
- x86_init.resources.memory_setup = visws_memory_setup;
- x86_init.mpparse.get_smp_config = visws_get_smp_config;
- x86_init.mpparse.find_smp_config = visws_find_smp_config;
- x86_init.irqs.pre_vector_init = visws_pre_intr_init;
- x86_init.irqs.trap_init = visws_trap_init;
- x86_init.timers.timer_init = visws_time_init;
- x86_init.pci.init = pci_visws_init;
- x86_init.pci.init_irq = x86_init_noop;
-
- /*
- * Install reboot quirks:
- */
- pm_power_off = visws_machine_power_off;
- machine_ops.emergency_restart = visws_machine_emergency_restart;
-
- /*
- * Do not use broadcast IPIs:
- */
- no_broadcast = 0;
-
-#ifdef CONFIG_X86_IO_APIC
- /*
- * Turn off IO-APIC detection and initialization:
- */
- skip_ioapic_setup = 1;
-#endif
-
- /*
- * Get Board rev.
- * First, we have to initialize the 307 part to allow us access
- * to the GPIO registers. Let's map them at 0x0fc0 which is right
- * after the PIIX4 PM section.
- */
- outb_p(SIO_DEV_SEL, SIO_INDEX);
- outb_p(SIO_GP_DEV, SIO_DATA); /* Talk to GPIO regs. */
-
- outb_p(SIO_DEV_MSB, SIO_INDEX);
- outb_p(SIO_GP_MSB, SIO_DATA); /* MSB of GPIO base address */
-
- outb_p(SIO_DEV_LSB, SIO_INDEX);
- outb_p(SIO_GP_LSB, SIO_DATA); /* LSB of GPIO base address */
-
- outb_p(SIO_DEV_ENB, SIO_INDEX);
- outb_p(1, SIO_DATA); /* Enable GPIO registers. */
-
- /*
- * Now, we have to map the power management section to write
- * a bit which enables access to the GPIO registers.
- * What lunatic came up with this shit?
- */
- outb_p(SIO_DEV_SEL, SIO_INDEX);
- outb_p(SIO_PM_DEV, SIO_DATA); /* Talk to GPIO regs. */
-
- outb_p(SIO_DEV_MSB, SIO_INDEX);
- outb_p(SIO_PM_MSB, SIO_DATA); /* MSB of PM base address */
-
- outb_p(SIO_DEV_LSB, SIO_INDEX);
- outb_p(SIO_PM_LSB, SIO_DATA); /* LSB of PM base address */
-
- outb_p(SIO_DEV_ENB, SIO_INDEX);
- outb_p(1, SIO_DATA); /* Enable PM registers. */
-
- /*
- * Now, write the PM register which enables the GPIO registers.
- */
- outb_p(SIO_PM_FER2, SIO_PM_INDEX);
- outb_p(SIO_PM_GP_EN, SIO_PM_DATA);
-
- /*
- * Now, initialize the GPIO registers.
- * We want them all to be inputs which is the
- * power on default, so let's leave them alone.
- * So, let's just read the board rev!
- */
- raw = inb_p(SIO_GP_DATA1);
- raw &= 0x7f; /* 7 bits of valid board revision ID. */
-
- if (visws_board_type == VISWS_320) {
- if (raw < 0x6) {
- visws_board_rev = 4;
- } else if (raw < 0xc) {
- visws_board_rev = 5;
- } else {
- visws_board_rev = 6;
- }
- } else if (visws_board_type == VISWS_540) {
- visws_board_rev = 2;
- } else {
- visws_board_rev = raw;
- }
-
- printk(KERN_INFO "Silicon Graphics Visual Workstation %s (rev %d) detected\n",
- (visws_board_type == VISWS_320 ? "320" :
- (visws_board_type == VISWS_540 ? "540" :
- "unknown")), visws_board_rev);
-}
-
-#define A01234 (LI_INTA_0 | LI_INTA_1 | LI_INTA_2 | LI_INTA_3 | LI_INTA_4)
-#define BCD (LI_INTB | LI_INTC | LI_INTD)
-#define ALLDEVS (A01234 | BCD)
-
-static __init void lithium_init(void)
-{
- set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
- set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);
-
- if ((li_pcia_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
- (li_pcia_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
- printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'A');
-/* panic("This machine is not SGI Visual Workstation 320/540"); */
- }
-
- if ((li_pcib_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
- (li_pcib_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
- printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'B');
-/* panic("This machine is not SGI Visual Workstation 320/540"); */
- }
-
- li_pcia_write16(LI_PCI_INTEN, ALLDEVS);
- li_pcib_write16(LI_PCI_INTEN, ALLDEVS);
-}
-
-static __init void cobalt_init(void)
-{
- /*
- * On normal SMP PC this is used only with SMP, but we have to
- * use it and set it up here to start the Cobalt clock
- */
- set_fixmap(FIX_APIC_BASE, APIC_DEFAULT_PHYS_BASE);
- setup_local_APIC();
- printk(KERN_INFO "Local APIC Version %#x, ID %#x\n",
- (unsigned int)apic_read(APIC_LVR),
- (unsigned int)apic_read(APIC_ID));
-
- set_fixmap(FIX_CO_CPU, CO_CPU_PHYS);
- set_fixmap(FIX_CO_APIC, CO_APIC_PHYS);
- printk(KERN_INFO "Cobalt Revision %#lx, APIC ID %#lx\n",
- co_cpu_read(CO_CPU_REV), co_apic_read(CO_APIC_ID));
-
- /* Enable Cobalt APIC being careful to NOT change the ID! */
- co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID) | CO_APIC_ENABLE);
-
- printk(KERN_INFO "Cobalt APIC enabled: ID reg %#lx\n",
- co_apic_read(CO_APIC_ID));
-}
-
-static void __init visws_trap_init(void)
-{
- lithium_init();
- cobalt_init();
-}
-
-/*
- * IRQ controller / APIC support:
- */
-
-static DEFINE_SPINLOCK(cobalt_lock);
-
-/*
- * Set the given Cobalt APIC Redirection Table entry to point
- * to the given IDT vector/index.
- */
-static inline void co_apic_set(int entry, int irq)
-{
- co_apic_write(CO_APIC_LO(entry), CO_APIC_LEVEL | (irq + FIRST_EXTERNAL_VECTOR));
- co_apic_write(CO_APIC_HI(entry), 0);
-}
-
-/*
- * Cobalt (IO)-APIC functions to handle PCI devices.
- */
-static inline int co_apic_ide0_hack(void)
-{
- extern char visws_board_type;
- extern char visws_board_rev;
-
- if (visws_board_type == VISWS_320 && visws_board_rev == 5)
- return 5;
- return CO_APIC_IDE0;
-}
-
-static int is_co_apic(unsigned int irq)
-{
- if (IS_CO_APIC(irq))
- return CO_APIC(irq);
-
- switch (irq) {
- case 0: return CO_APIC_CPU;
- case CO_IRQ_IDE0: return co_apic_ide0_hack();
- case CO_IRQ_IDE1: return CO_APIC_IDE1;
- default: return -1;
- }
-}
-
-
-/*
- * This is the SGI Cobalt (IO-)APIC:
- */
-static void enable_cobalt_irq(struct irq_data *data)
-{
- co_apic_set(is_co_apic(data->irq), data->irq);
-}
-
-static void disable_cobalt_irq(struct irq_data *data)
-{
- int entry = is_co_apic(data->irq);
-
- co_apic_write(CO_APIC_LO(entry), CO_APIC_MASK);
- co_apic_read(CO_APIC_LO(entry));
-}
-
-static void ack_cobalt_irq(struct irq_data *data)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cobalt_lock, flags);
- disable_cobalt_irq(data);
- apic_write(APIC_EOI, APIC_EOI_ACK);
- spin_unlock_irqrestore(&cobalt_lock, flags);
-}
-
-static struct irq_chip cobalt_irq_type = {
- .name = "Cobalt-APIC",
- .irq_enable = enable_cobalt_irq,
- .irq_disable = disable_cobalt_irq,
- .irq_ack = ack_cobalt_irq,
-};
-
-
-/*
- * This is the PIIX4-based 8259 that is wired up indirectly to Cobalt
- * -- not the manner expected by the code in i8259.c.
- *
- * there is a 'master' physical interrupt source that gets sent to
- * the CPU. But in the chipset there are various 'virtual' interrupts
- * waiting to be handled. We represent this to Linux through a 'master'
- * interrupt controller type, and through a special virtual interrupt-
- * controller. Device drivers only see the virtual interrupt sources.
- */
-static unsigned int startup_piix4_master_irq(struct irq_data *data)
-{
- legacy_pic->init(0);
- enable_cobalt_irq(data);
- return 0;
-}
-
-static struct irq_chip piix4_master_irq_type = {
- .name = "PIIX4-master",
- .irq_startup = startup_piix4_master_irq,
- .irq_ack = ack_cobalt_irq,
-};
-
-static void pii4_mask(struct irq_data *data) { }
-
-static struct irq_chip piix4_virtual_irq_type = {
- .name = "PIIX4-virtual",
- .irq_mask = pii4_mask,
-};
-
-/*
- * PIIX4-8259 master/virtual functions to handle interrupt requests
- * from legacy devices: floppy, parallel, serial, rtc.
- *
- * None of these get Cobalt APIC entries, neither do they have IDT
- * entries. These interrupts are purely virtual and distributed from
- * the 'master' interrupt source: CO_IRQ_8259.
- *
- * When the 8259 interrupts its handler figures out which of these
- * devices is interrupting and dispatches to its handler.
- *
- * CAREFUL: devices see the 'virtual' interrupt only. Thus disable/
- * enable_irq gets the right irq. This 'master' irq is never directly
- * manipulated by any driver.
- */
-static irqreturn_t piix4_master_intr(int irq, void *dev_id)
-{
- unsigned long flags;
- int realirq;
-
- raw_spin_lock_irqsave(&i8259A_lock, flags);
-
- /* Find out what's interrupting in the PIIX4 master 8259 */
- outb(0x0c, 0x20); /* OCW3 Poll command */
- realirq = inb(0x20);
-
- /*
- * Bit 7 == 0 means invalid/spurious
- */
- if (unlikely(!(realirq & 0x80)))
- goto out_unlock;
-
- realirq &= 7;
-
- if (unlikely(realirq == 2)) {
- outb(0x0c, 0xa0);
- realirq = inb(0xa0);
-
- if (unlikely(!(realirq & 0x80)))
- goto out_unlock;
-
- realirq = (realirq & 7) + 8;
- }
-
- /* mask and ack interrupt */
- cached_irq_mask |= 1 << realirq;
- if (unlikely(realirq > 7)) {
- inb(0xa1);
- outb(cached_slave_mask, 0xa1);
- outb(0x60 + (realirq & 7), 0xa0);
- outb(0x60 + 2, 0x20);
- } else {
- inb(0x21);
- outb(cached_master_mask, 0x21);
- outb(0x60 + realirq, 0x20);
- }
-
- raw_spin_unlock_irqrestore(&i8259A_lock, flags);
-
- /*
- * handle this 'virtual interrupt' as a Cobalt one now.
- */
- generic_handle_irq(realirq);
-
- return IRQ_HANDLED;
-
-out_unlock:
- raw_spin_unlock_irqrestore(&i8259A_lock, flags);
- return IRQ_NONE;
-}
-
-static struct irqaction master_action = {
- .handler = piix4_master_intr,
- .name = "PIIX4-8259",
- .flags = IRQF_NO_THREAD,
-};
-
-static struct irqaction cascade_action = {
- .handler = no_action,
- .name = "cascade",
- .flags = IRQF_NO_THREAD,
-};
-
-static inline void set_piix4_virtual_irq_type(void)
-{
- piix4_virtual_irq_type.irq_enable = i8259A_chip.irq_unmask;
- piix4_virtual_irq_type.irq_disable = i8259A_chip.irq_mask;
- piix4_virtual_irq_type.irq_unmask = i8259A_chip.irq_unmask;
-}
-
-static void __init visws_pre_intr_init(void)
-{
- int i;
-
- set_piix4_virtual_irq_type();
-
- for (i = 0; i < CO_IRQ_APIC0 + CO_APIC_LAST + 1; i++) {
- struct irq_chip *chip = NULL;
-
- if (i == 0)
- chip = &cobalt_irq_type;
- else if (i == CO_IRQ_IDE0)
- chip = &cobalt_irq_type;
- else if (i == CO_IRQ_IDE1)
- chip = &cobalt_irq_type;
- else if (i == CO_IRQ_8259)
- chip = &piix4_master_irq_type;
- else if (i < CO_IRQ_APIC0)
- chip = &piix4_virtual_irq_type;
- else if (IS_CO_APIC(i))
- chip = &cobalt_irq_type;
-
- if (chip)
- irq_set_chip(i, chip);
- }
-
- setup_irq(CO_IRQ_8259, &master_action);
- setup_irq(2, &cascade_action);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 01:08:21 +0000