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-rw-r--r--arch/blackfin/mm/Makefile2
-rw-r--r--arch/blackfin/mm/init.c129
-rw-r--r--arch/blackfin/mm/isram-driver.c101
-rw-r--r--arch/blackfin/mm/maccess.c97
-rw-r--r--arch/blackfin/mm/sram-alloc.c128
5 files changed, 268 insertions, 189 deletions
diff --git a/arch/blackfin/mm/Makefile b/arch/blackfin/mm/Makefile
index d489f894f4b..4c011b1f661 100644
--- a/arch/blackfin/mm/Makefile
+++ b/arch/blackfin/mm/Makefile
@@ -2,4 +2,4 @@
# arch/blackfin/mm/Makefile
#
-obj-y := sram-alloc.o isram-driver.o init.o
+obj-y := sram-alloc.o isram-driver.o init.o maccess.o
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index bb9c98f9cb5..166842de3dc 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -4,9 +4,11 @@
* Licensed under the GPL-2 or later.
*/
+#include <linux/gfp.h>
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/uaccess.h>
+#include <linux/export.h>
#include <asm/bfin-global.h>
#include <asm/pda.h>
#include <asm/cplbinit.h>
@@ -14,23 +16,11 @@
#include "blackfin_sram.h"
/*
- * BAD_PAGE is the page that is used for page faults when linux
- * is out-of-memory. Older versions of linux just did a
- * do_exit(), but using this instead means there is less risk
- * for a process dying in kernel mode, possibly leaving a inode
- * unused etc..
- *
- * BAD_PAGETABLE is the accompanying page-table: it is initialized
- * to point to BAD_PAGE entries.
- *
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
+ * ZERO_PAGE is a special page that is used for zero-initialized data and COW.
+ * Let the bss do its zero-init magic so we don't have to do it ourselves.
*/
-static unsigned long empty_bad_page_table;
-
-static unsigned long empty_bad_page;
-
-static unsigned long empty_zero_page;
+char empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
+EXPORT_SYMBOL(empty_zero_page);
#ifndef CONFIG_EXCEPTION_L1_SCRATCH
#if defined CONFIG_SYSCALL_TAB_L1
@@ -51,40 +41,27 @@ EXPORT_SYMBOL(cpu_pda);
void __init paging_init(void)
{
/*
- * make sure start_mem is page aligned, otherwise bootmem and
- * page_alloc get different views og the world
+ * make sure start_mem is page aligned, otherwise bootmem and
+ * page_alloc get different views of the world
*/
unsigned long end_mem = memory_end & PAGE_MASK;
- pr_debug("start_mem is %#lx virtual_end is %#lx\n", PAGE_ALIGN(memory_start), end_mem);
-
- /*
- * initialize the bad page table and bad page to point
- * to a couple of allocated pages
- */
- empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
- memset((void *)empty_zero_page, 0, PAGE_SIZE);
+ unsigned long zones_size[MAX_NR_ZONES] = {
+ [0] = 0,
+ [ZONE_DMA] = (end_mem - CONFIG_PHY_RAM_BASE_ADDRESS) >> PAGE_SHIFT,
+ [ZONE_NORMAL] = 0,
+#ifdef CONFIG_HIGHMEM
+ [ZONE_HIGHMEM] = 0,
+#endif
+ };
- /*
- * Set up SFC/DFC registers (user data space)
- */
+ /* Set up SFC/DFC registers (user data space) */
set_fs(KERNEL_DS);
- pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
+ pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
PAGE_ALIGN(memory_start), end_mem);
-
- {
- unsigned long zones_size[MAX_NR_ZONES] = { 0, };
-
- zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
- zones_size[ZONE_NORMAL] = 0;
-#ifdef CONFIG_HIGHMEM
- zones_size[ZONE_HIGHMEM] = 0;
-#endif
- free_area_init(zones_size);
- }
+ free_area_init_node(0, zones_size,
+ CONFIG_PHY_RAM_BASE_ADDRESS >> PAGE_SHIFT, NULL);
}
asmlinkage void __init init_pda(void)
@@ -99,9 +76,6 @@ asmlinkage void __init init_pda(void)
valid pointers to it. */
memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
- cpu_pda[0].next = &cpu_pda[1];
- cpu_pda[1].next = &cpu_pda[0];
-
#ifdef CONFIG_EXCEPTION_L1_SCRATCH
cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
L1_SCRATCH_LENGTH);
@@ -116,63 +90,24 @@ asmlinkage void __init init_pda(void)
void __init mem_init(void)
{
- unsigned int codek = 0, datak = 0, initk = 0;
- unsigned int reservedpages = 0, freepages = 0;
- unsigned long tmp;
- unsigned long start_mem = memory_start;
- unsigned long end_mem = memory_end;
-
- end_mem &= PAGE_MASK;
- high_memory = (void *)end_mem;
-
- start_mem = PAGE_ALIGN(start_mem);
- max_mapnr = num_physpages = MAP_NR(high_memory);
- printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", num_physpages);
-
- /* This will put all memory onto the freelists. */
- totalram_pages = free_all_bootmem();
-
- reservedpages = 0;
- for (tmp = 0; tmp < max_mapnr; tmp++)
- if (PageReserved(pfn_to_page(tmp)))
- reservedpages++;
- freepages = max_mapnr - reservedpages;
-
- /* do not count in kernel image between _rambase and _ramstart */
- reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT;
-#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
- reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >> PAGE_SHIFT;
-#endif
+ char buf[64];
- codek = (_etext - _stext) >> 10;
- initk = (__init_end - __init_begin) >> 10;
- datak = ((_ramstart - _rambase) >> 10) - codek - initk;
+ high_memory = (void *)(memory_end & PAGE_MASK);
+ max_mapnr = MAP_NR(high_memory);
+ printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
- printk(KERN_INFO
- "Memory available: %luk/%luk RAM, "
- "(%uk init code, %uk kernel code, %uk data, %uk dma, %uk reserved)\n",
- (unsigned long) freepages << (PAGE_SHIFT-10), _ramend >> 10,
- initk, codek, datak, DMA_UNCACHED_REGION >> 10, (reservedpages << (PAGE_SHIFT-10)));
-}
+ /* This will put all low memory onto the freelists. */
+ free_all_bootmem();
-static void __init free_init_pages(const char *what, unsigned long begin, unsigned long end)
-{
- unsigned long addr;
- /* next to check that the page we free is not a partial page */
- for (addr = begin; addr + PAGE_SIZE <= end; addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- init_page_count(virt_to_page(addr));
- free_page(addr);
- totalram_pages++;
- }
- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+ snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
+ mem_init_print_info(buf);
}
#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
#ifndef CONFIG_MPU
- free_init_pages("initrd memory", start, end);
+ free_reserved_area((void *)start, (void *)end, -1, "initrd");
#endif
}
#endif
@@ -180,8 +115,8 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
void __init_refok free_initmem(void)
{
#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
- free_init_pages("unused kernel memory",
- (unsigned long)(&__init_begin),
- (unsigned long)(&__init_end));
+ free_initmem_default(-1);
+ if (memory_start == (unsigned long)(&__init_end))
+ memory_start = (unsigned long)(&__init_begin);
#endif
}
diff --git a/arch/blackfin/mm/isram-driver.c b/arch/blackfin/mm/isram-driver.c
index 84cdc5a1c13..7e2e674ed44 100644
--- a/arch/blackfin/mm/isram-driver.c
+++ b/arch/blackfin/mm/isram-driver.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
@@ -42,13 +43,12 @@ static DEFINE_SPINLOCK(dtest_lock);
/* Takes a void pointer */
#define IADDR2DTEST(x) \
({ unsigned long __addr = (unsigned long)(x); \
- (__addr & 0x47F8) | /* address bits 14 & 10:3 */ \
- (__addr & 0x8000) << 23 | /* Bank A/B */ \
- (__addr & 0x0800) << 15 | /* address bit 11 */ \
- (__addr & 0x3000) << 4 | /* address bits 13:12 */ \
- (__addr & 0x8000) << 8 | /* address bit 15 */ \
- (0x1000000) | /* instruction access = 1 */ \
- (0x4); /* data array = 1 */ \
+ ((__addr & (1 << 11)) << (26 - 11)) | /* addr bit 11 (Way0/Way1) */ \
+ (1 << 24) | /* instruction access = 1 */ \
+ ((__addr & (1 << 15)) << (23 - 15)) | /* addr bit 15 (Data Bank) */ \
+ ((__addr & (3 << 12)) << (16 - 12)) | /* addr bits 13:12 (Subbank) */ \
+ (__addr & 0x47F8) | /* addr bits 14 & 10:3 */ \
+ (1 << 2); /* data array = 1 */ \
})
/* Takes a pointer, and returns the offset (in bits) which things should be shifted */
@@ -62,7 +62,7 @@ static void isram_write(const void *addr, uint64_t data)
uint32_t cmd;
unsigned long flags;
- if (addr >= (void *)(L1_CODE_START + L1_CODE_LENGTH))
+ if (unlikely(addr >= (void *)(L1_CODE_START + L1_CODE_LENGTH)))
return;
cmd = IADDR2DTEST(addr) | 2; /* write */
@@ -93,7 +93,7 @@ static uint64_t isram_read(const void *addr)
unsigned long flags;
uint64_t ret;
- if (addr > (void *)(L1_CODE_START + L1_CODE_LENGTH))
+ if (unlikely(addr > (void *)(L1_CODE_START + L1_CODE_LENGTH)))
return 0;
cmd = IADDR2DTEST(addr) | 0; /* read */
@@ -120,7 +120,7 @@ static bool isram_check_addr(const void *addr, size_t n)
{
if ((addr >= (void *)L1_CODE_START) &&
(addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))) {
- if ((addr + n) > (void *)(L1_CODE_START + L1_CODE_LENGTH)) {
+ if (unlikely((addr + n) > (void *)(L1_CODE_START + L1_CODE_LENGTH))) {
show_stack(NULL, NULL);
pr_err("copy involving %p length (%zu) too long\n", addr, n);
}
@@ -195,7 +195,7 @@ EXPORT_SYMBOL(isram_memcpy);
#ifdef CONFIG_BFIN_ISRAM_SELF_TEST
-#define TEST_LEN 0x100
+static int test_len = 0x20000;
static __init void hex_dump(unsigned char *buf, int len)
{
@@ -211,15 +211,15 @@ static __init int isram_read_test(char *sdram, void *l1inst)
pr_info("INFO: running isram_read tests\n");
/* setup some different data to play with */
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
- dma_memcpy(l1inst, sdram, TEST_LEN);
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
+ dma_memcpy(l1inst, sdram, test_len);
/* make sure we can read the L1 inst */
- for (i = 0; i < TEST_LEN; i += sizeof(uint64_t)) {
+ for (i = 0; i < test_len; i += sizeof(uint64_t)) {
data1 = isram_read(l1inst + i);
memcpy(&data2, sdram + i, sizeof(data2));
- if (memcmp(&data1, &data2, sizeof(uint64_t))) {
+ if (data1 != data2) {
pr_err("FAIL: isram_read(%p) returned %#llx but wanted %#llx\n",
l1inst + i, data1, data2);
++ret;
@@ -237,25 +237,25 @@ static __init int isram_write_test(char *sdram, void *l1inst)
pr_info("INFO: running isram_write tests\n");
/* setup some different data to play with */
- memset(sdram, 0, TEST_LEN * 2);
- dma_memcpy(l1inst, sdram, TEST_LEN);
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
+ memset(sdram, 0, test_len * 2);
+ dma_memcpy(l1inst, sdram, test_len);
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
/* make sure we can write the L1 inst */
- for (i = 0; i < TEST_LEN; i += sizeof(uint64_t)) {
+ for (i = 0; i < test_len; i += sizeof(uint64_t)) {
memcpy(&data1, sdram + i, sizeof(data1));
isram_write(l1inst + i, data1);
data2 = isram_read(l1inst + i);
- if (memcmp(&data1, &data2, sizeof(uint64_t))) {
+ if (data1 != data2) {
pr_err("FAIL: isram_write(%p, %#llx) != %#llx\n",
l1inst + i, data1, data2);
++ret;
}
}
- dma_memcpy(sdram + TEST_LEN, l1inst, TEST_LEN);
- if (memcmp(sdram, sdram + TEST_LEN, TEST_LEN)) {
+ dma_memcpy(sdram + test_len, l1inst, test_len);
+ if (memcmp(sdram, sdram + test_len, test_len)) {
pr_err("FAIL: isram_write() did not work properly\n");
++ret;
}
@@ -267,12 +267,12 @@ static __init int
_isram_memcpy_test(char pattern, void *sdram, void *l1inst, const char *smemcpy,
void *(*fmemcpy)(void *, const void *, size_t))
{
- memset(sdram, pattern, TEST_LEN);
- fmemcpy(l1inst, sdram, TEST_LEN);
- fmemcpy(sdram + TEST_LEN, l1inst, TEST_LEN);
- if (memcmp(sdram, sdram + TEST_LEN, TEST_LEN)) {
+ memset(sdram, pattern, test_len);
+ fmemcpy(l1inst, sdram, test_len);
+ fmemcpy(sdram + test_len, l1inst, test_len);
+ if (memcmp(sdram, sdram + test_len, test_len)) {
pr_err("FAIL: %s(%p <=> %p, %#x) failed (data is %#x)\n",
- smemcpy, l1inst, sdram, TEST_LEN, pattern);
+ smemcpy, l1inst, sdram, test_len, pattern);
return 1;
}
return 0;
@@ -291,12 +291,13 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
/* check read of small, unaligned, and hardware 64bit limits */
pr_info("INFO: running isram_memcpy (read) tests\n");
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
- dma_memcpy(l1inst, sdram, TEST_LEN);
+ /* setup some different data to play with */
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
+ dma_memcpy(l1inst, sdram, test_len);
thisret = 0;
- for (i = 0; i < TEST_LEN - 32; ++i) {
+ for (i = 0; i < test_len - 32; ++i) {
unsigned char cmp[32];
for (j = 1; j <= 32; ++j) {
memset(cmp, 0, sizeof(cmp));
@@ -309,7 +310,7 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
pr_cont("\n");
if (++thisret > 20) {
pr_err("FAIL: skipping remaining series\n");
- i = TEST_LEN;
+ i = test_len;
break;
}
}
@@ -320,11 +321,11 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
/* check write of small, unaligned, and hardware 64bit limits */
pr_info("INFO: running isram_memcpy (write) tests\n");
- memset(sdram + TEST_LEN, 0, TEST_LEN);
- dma_memcpy(l1inst, sdram + TEST_LEN, TEST_LEN);
+ memset(sdram + test_len, 0, test_len);
+ dma_memcpy(l1inst, sdram + test_len, test_len);
thisret = 0;
- for (i = 0; i < TEST_LEN - 32; ++i) {
+ for (i = 0; i < test_len - 32; ++i) {
unsigned char cmp[32];
for (j = 1; j <= 32; ++j) {
isram_memcpy(l1inst + i, sdram + i, j);
@@ -337,7 +338,7 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
pr_cont("\n");
if (++thisret > 20) {
pr_err("FAIL: skipping remaining series\n");
- i = TEST_LEN;
+ i = test_len;
break;
}
}
@@ -354,22 +355,30 @@ static __init int isram_test_init(void)
char *sdram;
void *l1inst;
- sdram = kmalloc(TEST_LEN * 2, GFP_KERNEL);
- if (!sdram) {
- pr_warning("SKIP: could not allocate sdram\n");
- return 0;
+ /* Try to test as much of L1SRAM as possible */
+ while (test_len) {
+ test_len >>= 1;
+ l1inst = l1_inst_sram_alloc(test_len);
+ if (l1inst)
+ break;
}
-
- l1inst = l1_inst_sram_alloc(TEST_LEN);
if (!l1inst) {
- kfree(sdram);
pr_warning("SKIP: could not allocate L1 inst\n");
return 0;
}
+ pr_info("INFO: testing %#x bytes (%p - %p)\n",
+ test_len, l1inst, l1inst + test_len);
+
+ sdram = kmalloc(test_len * 2, GFP_KERNEL);
+ if (!sdram) {
+ sram_free(l1inst);
+ pr_warning("SKIP: could not allocate sdram\n");
+ return 0;
+ }
/* sanity check initial L1 inst state */
ret = 1;
- pr_info("INFO: running initial dma_memcpy checks\n");
+ pr_info("INFO: running initial dma_memcpy checks %p\n", sdram);
if (_isram_memcpy_test(0xa, sdram, l1inst, dma_memcpy))
goto abort;
if (_isram_memcpy_test(0x5, sdram, l1inst, dma_memcpy))
diff --git a/arch/blackfin/mm/maccess.c b/arch/blackfin/mm/maccess.c
new file mode 100644
index 00000000000..e2532114c5f
--- /dev/null
+++ b/arch/blackfin/mm/maccess.c
@@ -0,0 +1,97 @@
+/*
+ * safe read and write memory routines callable while atomic
+ *
+ * Copyright 2005-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/uaccess.h>
+#include <asm/dma.h>
+
+static int validate_memory_access_address(unsigned long addr, int size)
+{
+ if (size < 0 || addr == 0)
+ return -EFAULT;
+ return bfin_mem_access_type(addr, size);
+}
+
+long probe_kernel_read(void *dst, const void *src, size_t size)
+{
+ unsigned long lsrc = (unsigned long)src;
+ int mem_type;
+
+ mem_type = validate_memory_access_address(lsrc, size);
+ if (mem_type < 0)
+ return mem_type;
+
+ if (lsrc >= SYSMMR_BASE) {
+ if (size == 2 && lsrc % 2 == 0) {
+ u16 mmr = bfin_read16(src);
+ memcpy(dst, &mmr, sizeof(mmr));
+ return 0;
+ } else if (size == 4 && lsrc % 4 == 0) {
+ u32 mmr = bfin_read32(src);
+ memcpy(dst, &mmr, sizeof(mmr));
+ return 0;
+ }
+ } else {
+ switch (mem_type) {
+ case BFIN_MEM_ACCESS_CORE:
+ case BFIN_MEM_ACCESS_CORE_ONLY:
+ return __probe_kernel_read(dst, src, size);
+ /* XXX: should support IDMA here with SMP */
+ case BFIN_MEM_ACCESS_DMA:
+ if (dma_memcpy(dst, src, size))
+ return 0;
+ break;
+ case BFIN_MEM_ACCESS_ITEST:
+ if (isram_memcpy(dst, src, size))
+ return 0;
+ break;
+ }
+ }
+
+ return -EFAULT;
+}
+
+long probe_kernel_write(void *dst, const void *src, size_t size)
+{
+ unsigned long ldst = (unsigned long)dst;
+ int mem_type;
+
+ mem_type = validate_memory_access_address(ldst, size);
+ if (mem_type < 0)
+ return mem_type;
+
+ if (ldst >= SYSMMR_BASE) {
+ if (size == 2 && ldst % 2 == 0) {
+ u16 mmr;
+ memcpy(&mmr, src, sizeof(mmr));
+ bfin_write16(dst, mmr);
+ return 0;
+ } else if (size == 4 && ldst % 4 == 0) {
+ u32 mmr;
+ memcpy(&mmr, src, sizeof(mmr));
+ bfin_write32(dst, mmr);
+ return 0;
+ }
+ } else {
+ switch (mem_type) {
+ case BFIN_MEM_ACCESS_CORE:
+ case BFIN_MEM_ACCESS_CORE_ONLY:
+ return __probe_kernel_write(dst, src, size);
+ /* XXX: should support IDMA here with SMP */
+ case BFIN_MEM_ACCESS_DMA:
+ if (dma_memcpy(dst, src, size))
+ return 0;
+ break;
+ case BFIN_MEM_ACCESS_ITEST:
+ if (isram_memcpy(dst, src, size))
+ return 0;
+ break;
+ }
+ }
+
+ return -EFAULT;
+}
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
index f068c11ea98..1f3b3ef3e10 100644
--- a/arch/blackfin/mm/sram-alloc.c
+++ b/arch/blackfin/mm/sram-alloc.c
@@ -15,8 +15,10 @@
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/rtc.h>
+#include <linux/slab.h>
#include <asm/blackfin.h>
#include <asm/mem_map.h>
#include "blackfin_sram.h"
@@ -184,9 +186,45 @@ static void __init l1_inst_sram_init(void)
#endif
}
+#ifdef __ADSPBF60x__
+static irqreturn_t l2_ecc_err(int irq, void *dev_id)
+{
+ int status;
+
+ printk(KERN_ERR "L2 ecc error happened\n");
+ status = bfin_read32(L2CTL0_STAT);
+ if (status & 0x1)
+ printk(KERN_ERR "Core channel error type:0x%x, addr:0x%x\n",
+ bfin_read32(L2CTL0_ET0), bfin_read32(L2CTL0_EADDR0));
+ if (status & 0x2)
+ printk(KERN_ERR "System channel error type:0x%x, addr:0x%x\n",
+ bfin_read32(L2CTL0_ET1), bfin_read32(L2CTL0_EADDR1));
+
+ status = status >> 8;
+ if (status)
+ printk(KERN_ERR "L2 Bank%d error, addr:0x%x\n",
+ status, bfin_read32(L2CTL0_ERRADDR0 + status));
+
+ panic("L2 Ecc error");
+ return IRQ_HANDLED;
+}
+#endif
+
static void __init l2_sram_init(void)
{
#if L2_LENGTH != 0
+
+#ifdef __ADSPBF60x__
+ int ret;
+
+ ret = request_irq(IRQ_L2CTL0_ECC_ERR, l2_ecc_err, 0, "l2-ecc-err",
+ NULL);
+ if (unlikely(ret < 0)) {
+ printk(KERN_INFO "Fail to request l2 ecc error interrupt");
+ return;
+ }
+#endif
+
free_l2_sram_head.next =
kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
if (!free_l2_sram_head.next) {
@@ -255,7 +293,8 @@ static void *_sram_alloc(size_t size, struct sram_piece *pfree_head,
plast->next = pslot->next;
pavail = pslot;
} else {
- pavail = kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
+ /* use atomic so our L1 allocator can be used atomically */
+ pavail = kmem_cache_alloc(sram_piece_cache, GFP_ATOMIC);
if (!pavail)
return NULL;
@@ -402,7 +441,7 @@ void *l1_data_A_sram_alloc(size_t size)
void *addr;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
@@ -411,7 +450,6 @@ void *l1_data_A_sram_alloc(size_t size)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
- put_cpu();
pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -430,7 +468,7 @@ int l1_data_A_sram_free(const void *addr)
int ret;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
@@ -439,7 +477,6 @@ int l1_data_A_sram_free(const void *addr)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
- put_cpu();
return ret;
#else
@@ -455,7 +492,7 @@ void *l1_data_B_sram_alloc(size_t size)
void *addr;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
@@ -464,7 +501,6 @@ void *l1_data_B_sram_alloc(size_t size)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
- put_cpu();
pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -483,7 +519,7 @@ int l1_data_B_sram_free(const void *addr)
int ret;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
@@ -492,7 +528,6 @@ int l1_data_B_sram_free(const void *addr)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
- put_cpu();
return ret;
#else
@@ -540,7 +575,7 @@ void *l1_inst_sram_alloc(size_t size)
void *addr;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
@@ -549,7 +584,6 @@ void *l1_inst_sram_alloc(size_t size)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
- put_cpu();
pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
(long unsigned int)addr, size);
@@ -568,7 +602,7 @@ int l1_inst_sram_free(const void *addr)
int ret;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
@@ -577,7 +611,6 @@ int l1_inst_sram_free(const void *addr)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
- put_cpu();
return ret;
#else
@@ -593,7 +626,7 @@ void *l1sram_alloc(size_t size)
void *addr;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
@@ -602,7 +635,6 @@ void *l1sram_alloc(size_t size)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
- put_cpu();
return addr;
}
@@ -614,7 +646,7 @@ void *l1sram_alloc_max(size_t *psize)
void *addr;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
@@ -623,7 +655,6 @@ void *l1sram_alloc_max(size_t *psize)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
- put_cpu();
return addr;
}
@@ -635,7 +666,7 @@ int l1sram_free(const void *addr)
int ret;
unsigned int cpu;
- cpu = get_cpu();
+ cpu = smp_processor_id();
/* add mutex operation */
spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
@@ -644,7 +675,6 @@ int l1sram_free(const void *addr)
/* add mutex operation */
spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
- put_cpu();
return ret;
}
@@ -711,18 +741,18 @@ int sram_free_with_lsl(const void *addr)
{
struct sram_list_struct *lsl, **tmp;
struct mm_struct *mm = current->mm;
+ int ret = -1;
for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next)
- if ((*tmp)->addr == addr)
- goto found;
- return -1;
-found:
- lsl = *tmp;
- sram_free(addr);
- *tmp = lsl->next;
- kfree(lsl);
+ if ((*tmp)->addr == addr) {
+ lsl = *tmp;
+ ret = sram_free(addr);
+ *tmp = lsl->next;
+ kfree(lsl);
+ break;
+ }
- return 0;
+ return ret;
}
EXPORT_SYMBOL(sram_free_with_lsl);
@@ -771,7 +801,7 @@ EXPORT_SYMBOL(sram_alloc_with_lsl);
/* Need to keep line of output the same. Currently, that is 44 bytes
* (including newline).
*/
-static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
+static int _sram_proc_show(struct seq_file *m, const char *desc,
struct sram_piece *pfree_head,
struct sram_piece *pused_head)
{
@@ -780,13 +810,13 @@ static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
if (!pfree_head || !pused_head)
return -1;
- *len += sprintf(&buf[*len], "--- SRAM %-14s Size PID State \n", desc);
+ seq_printf(m, "--- SRAM %-14s Size PID State \n", desc);
/* search the relevant memory slot */
pslot = pused_head->next;
while (pslot != NULL) {
- *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
+ seq_printf(m, "%p-%p %10i %5i %-10s\n",
pslot->paddr, pslot->paddr + pslot->size,
pslot->size, pslot->pid, "ALLOCATED");
@@ -796,7 +826,7 @@ static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
pslot = pfree_head->next;
while (pslot != NULL) {
- *len += sprintf(&buf[*len], "%p-%p %10i %5i %-10s\n",
+ seq_printf(m, "%p-%p %10i %5i %-10s\n",
pslot->paddr, pslot->paddr + pslot->size,
pslot->size, pslot->pid, "FREE");
@@ -805,54 +835,62 @@ static int _sram_proc_read(char *buf, int *len, int count, const char *desc,
return 0;
}
-static int sram_proc_read(char *buf, char **start, off_t offset, int count,
- int *eof, void *data)
+static int sram_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
unsigned int cpu;
for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- if (_sram_proc_read(buf, &len, count, "Scratchpad",
+ if (_sram_proc_show(m, "Scratchpad",
&per_cpu(free_l1_ssram_head, cpu), &per_cpu(used_l1_ssram_head, cpu)))
goto not_done;
#if L1_DATA_A_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data A",
+ if (_sram_proc_show(m, "L1 Data A",
&per_cpu(free_l1_data_A_sram_head, cpu),
&per_cpu(used_l1_data_A_sram_head, cpu)))
goto not_done;
#endif
#if L1_DATA_B_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Data B",
+ if (_sram_proc_show(m, "L1 Data B",
&per_cpu(free_l1_data_B_sram_head, cpu),
&per_cpu(used_l1_data_B_sram_head, cpu)))
goto not_done;
#endif
#if L1_CODE_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L1 Instruction",
+ if (_sram_proc_show(m, "L1 Instruction",
&per_cpu(free_l1_inst_sram_head, cpu),
&per_cpu(used_l1_inst_sram_head, cpu)))
goto not_done;
#endif
}
#if L2_LENGTH != 0
- if (_sram_proc_read(buf, &len, count, "L2", &free_l2_sram_head,
- &used_l2_sram_head))
+ if (_sram_proc_show(m, "L2", &free_l2_sram_head, &used_l2_sram_head))
goto not_done;
#endif
- *eof = 1;
not_done:
- return len;
+ return 0;
}
+static int sram_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sram_proc_show, NULL);
+}
+
+static const struct file_operations sram_proc_ops = {
+ .open = sram_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static int __init sram_proc_init(void)
{
struct proc_dir_entry *ptr;
- ptr = create_proc_entry("sram", S_IFREG | S_IRUGO, NULL);
+
+ ptr = proc_create("sram", S_IRUGO, NULL, &sram_proc_ops);
if (!ptr) {
printk(KERN_WARNING "unable to create /proc/sram\n");
return -1;
}
- ptr->read_proc = sram_proc_read;
return 0;
}
late_initcall(sram_proc_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-15 22:20:34 +0000