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-rw-r--r--arch/microblaze/kernel/cpu/cpuinfo.c1
-rw-r--r--arch/microblaze/kernel/entry.S46
-rw-r--r--arch/microblaze/kernel/exceptions.c3
-rw-r--r--arch/microblaze/kernel/hw_exception_handler.S9
-rw-r--r--arch/microblaze/kernel/prom.c4
-rw-r--r--arch/microblaze/kernel/prom_parse.c38
-rw-r--r--arch/microblaze/kernel/vmlinux.lds.S16
7 files changed, 56 insertions, 61 deletions
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index 87c79fa275c..2c309fccf23 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -32,6 +32,7 @@ const struct cpu_ver_key cpu_ver_lookup[] = {
{"7.30.a", 0x10},
{"7.30.b", 0x11},
{"8.00.a", 0x12},
+ {"8.00.b", 0x13},
{NULL, 0},
};
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 819238b8a42..41c30cdb270 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -287,25 +287,44 @@
* are masked. This is nice, means we don't have to CLI before state save
*/
C_ENTRY(_user_exception):
- addi r14, r14, 4 /* return address is 4 byte after call */
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
+ addi r14, r14, 4 /* return address is 4 byte after call */
+
+ mfs r1, rmsr
+ nop
+ andi r1, r1, MSR_UMS
+ bnei r1, 1f
+
+/* Kernel-mode state save - kernel execve */
+ lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
+ tophys(r1,r1);
+
+ addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
+ SAVE_REGS
+ swi r1, r1, PTO + PT_MODE; /* pt_regs -> kernel mode */
+ brid 2f;
+ nop; /* Fill delay slot */
+
+/* User-mode state save. */
+1:
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */
tophys(r1,r1);
lwi r1, r1, TS_THREAD_INFO; /* get stack from task_struct */
- /* MS these three instructions can be added to one */
- /* addik r1, r1, THREAD_SIZE; */
- /* tophys(r1,r1); */
- /* addik r1, r1, -STATE_SAVE_SIZE; */
- addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE;
+/* calculate kernel stack pointer from task struct 8k */
+ addik r1, r1, THREAD_SIZE;
+ tophys(r1,r1);
+
+ addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
SAVE_REGS
swi r0, r1, PTO + PT_R3
swi r0, r1, PTO + PT_R4
+ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
swi r11, r1, PTO+PT_R1; /* Store user SP. */
clear_ums;
- lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
+2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
/* Save away the syscall number. */
swi r12, r1, PTO+PT_R0;
tovirt(r1,r1)
@@ -375,6 +394,9 @@ C_ENTRY(ret_from_trap):
swi r3, r1, PTO + PT_R3
swi r4, r1, PTO + PT_R4
+ lwi r11, r1, PTO + PT_MODE;
+/* See if returning to kernel mode, if so, skip resched &c. */
+ bnei r11, 2f;
/* We're returning to user mode, so check for various conditions that
* trigger rescheduling. */
/* FIXME: Restructure all these flag checks. */
@@ -417,6 +439,16 @@ C_ENTRY(ret_from_trap):
RESTORE_REGS;
addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */
lwi r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */
+ bri 6f;
+
+/* Return to kernel state. */
+2: set_bip; /* Ints masked for state restore */
+ VM_OFF;
+ tophys(r1,r1);
+ RESTORE_REGS;
+ addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */
+ tovirt(r1,r1);
+6:
TRAP_return: /* Make global symbol for debugging */
rtbd r14, 0; /* Instructions to return from an IRQ */
nop;
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
index 478f2943ede..a7fa6ae76d8 100644
--- a/arch/microblaze/kernel/exceptions.c
+++ b/arch/microblaze/kernel/exceptions.c
@@ -25,6 +25,7 @@
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <asm/current.h>
+#include <asm/cacheflush.h>
#define MICROBLAZE_ILL_OPCODE_EXCEPTION 0x02
#define MICROBLAZE_IBUS_EXCEPTION 0x03
@@ -52,6 +53,8 @@ void die(const char *str, struct pt_regs *fp, long err)
void sw_exception(struct pt_regs *regs)
{
_exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16);
+ flush_dcache_range(regs->r16, regs->r16 + 0x4);
+ flush_icache_range(regs->r16, regs->r16 + 0x4);
}
void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
index 781195438ee..25f6e07d8de 100644
--- a/arch/microblaze/kernel/hw_exception_handler.S
+++ b/arch/microblaze/kernel/hw_exception_handler.S
@@ -945,11 +945,20 @@ store3: sbi r3, r4, 2;
store4: sbi r3, r4, 3; /* Delay slot */
ex_shw_vm:
/* Store the lower half-word, byte-by-byte into destination address */
+#ifdef __MICROBLAZEEL__
+ lbui r3, r5, 0;
+store5: sbi r3, r4, 0;
+ lbui r3, r5, 1;
+ brid ret_from_exc;
+store6: sbi r3, r4, 1; /* Delay slot */
+#else
lbui r3, r5, 2;
store5: sbi r3, r4, 0;
lbui r3, r5, 3;
brid ret_from_exc;
store6: sbi r3, r4, 1; /* Delay slot */
+#endif
+
ex_sw_end_vm: /* Exception handling of store word, ends. */
/* We have to prevent cases that get/put_user macros get unaligned pointer
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index a105301e2b7..c881393f07f 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -61,14 +61,12 @@ static int __init early_init_dt_scan_serial(unsigned long node,
char *p;
int *addr;
- pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
+ pr_debug("search \"serial\", depth: %d, uname: %s\n", depth, uname);
/* find all serial nodes */
if (strncmp(uname, "serial", 6) != 0)
return 0;
- early_init_dt_check_for_initrd(node);
-
/* find compatible node with uartlite */
p = of_get_flat_dt_prop(node, "compatible", &l);
if ((strncmp(p, "xlnx,xps-uartlite", 17) != 0) &&
diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c
index 99d9b61cccb..9ae24f4b882 100644
--- a/arch/microblaze/kernel/prom_parse.c
+++ b/arch/microblaze/kernel/prom_parse.c
@@ -110,41 +110,3 @@ void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
*size = of_read_number(dma_window, cells);
}
-
-/**
- * Search the device tree for the best MAC address to use. 'mac-address' is
- * checked first, because that is supposed to contain to "most recent" MAC
- * address. If that isn't set, then 'local-mac-address' is checked next,
- * because that is the default address. If that isn't set, then the obsolete
- * 'address' is checked, just in case we're using an old device tree.
- *
- * Note that the 'address' property is supposed to contain a virtual address of
- * the register set, but some DTS files have redefined that property to be the
- * MAC address.
- *
- * All-zero MAC addresses are rejected, because those could be properties that
- * exist in the device tree, but were not set by U-Boot. For example, the
- * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
- * addresses. Some older U-Boots only initialized 'local-mac-address'. In
- * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
- * but is all zeros.
-*/
-const void *of_get_mac_address(struct device_node *np)
-{
- struct property *pp;
-
- pp = of_find_property(np, "mac-address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- pp = of_find_property(np, "local-mac-address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- pp = of_find_property(np, "address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- return NULL;
-}
-EXPORT_SYMBOL(of_get_mac_address);
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index 96a88c31fe4..3451bdec9f0 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -123,20 +123,10 @@ SECTIONS {
__init_end_before_initramfs = .;
- .init.ramfs ALIGN(PAGE_SIZE) : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
- __initramfs_start = .;
- *(.init.ramfs)
- __initramfs_end = .;
- . = ALIGN(4);
- LONG(0);
-/*
- * FIXME this can break initramfs for MMU.
- * Pad init.ramfs up to page boundary,
- * so that __init_end == __bss_start. This will make image.elf
- * consistent with the image.bin
- */
- /* . = ALIGN(PAGE_SIZE); */
+ .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
+ INIT_RAM_FS
}
+
__init_end = .;
.bss ALIGN (PAGE_SIZE) : AT(ADDR(.bss) - LOAD_OFFSET) {