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Diffstat (limited to 'arch/sparc64/mm/fault.c')
-rw-r--r--arch/sparc64/mm/fault.c73
1 files changed, 6 insertions, 67 deletions
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index db1e3310e90..6f0539aa44d 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -30,10 +30,6 @@
#include <asm/sections.h>
#include <asm/kdebug.h>
-#define ELEMENTS(arr) (sizeof (arr)/sizeof (arr[0]))
-
-extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
-
/*
* To debug kernel to catch accesses to certain virtual/physical addresses.
* Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
@@ -71,53 +67,6 @@ void set_brkpt(unsigned long addr, unsigned char mask, int flags, int mode)
: "memory");
}
-/* Nice, simple, prom library does all the sweating for us. ;) */
-unsigned long __init prom_probe_memory (void)
-{
- register struct linux_mlist_p1275 *mlist;
- register unsigned long bytes, base_paddr, tally;
- register int i;
-
- i = 0;
- mlist = *prom_meminfo()->p1275_available;
- bytes = tally = mlist->num_bytes;
- base_paddr = mlist->start_adr;
-
- sp_banks[0].base_addr = base_paddr;
- sp_banks[0].num_bytes = bytes;
-
- while (mlist->theres_more != (void *) 0) {
- i++;
- mlist = mlist->theres_more;
- bytes = mlist->num_bytes;
- tally += bytes;
- if (i >= SPARC_PHYS_BANKS-1) {
- printk ("The machine has more banks than "
- "this kernel can support\n"
- "Increase the SPARC_PHYS_BANKS "
- "setting (currently %d)\n",
- SPARC_PHYS_BANKS);
- i = SPARC_PHYS_BANKS-1;
- break;
- }
-
- sp_banks[i].base_addr = mlist->start_adr;
- sp_banks[i].num_bytes = mlist->num_bytes;
- }
-
- i++;
- sp_banks[i].base_addr = 0xdeadbeefbeefdeadUL;
- sp_banks[i].num_bytes = 0;
-
- /* Now mask all bank sizes on a page boundary, it is all we can
- * use anyways.
- */
- for (i = 0; sp_banks[i].num_bytes != 0; i++)
- sp_banks[i].num_bytes &= PAGE_MASK;
-
- return tally;
-}
-
static void __kprobes unhandled_fault(unsigned long address,
struct task_struct *tsk,
struct pt_regs *regs)
@@ -158,7 +107,7 @@ static void bad_kernel_pc(struct pt_regs *regs)
* this. Additionally, to prevent kswapd from ripping ptes from
* under us, raise interrupts around the time that we look at the
* pte, kswapd will have to wait to get his smp ipi response from
- * us. This saves us having to get page_table_lock.
+ * us. vmtruncate likewise. This saves us having to get pte lock.
*/
static unsigned int get_user_insn(unsigned long tpc)
{
@@ -242,7 +191,6 @@ static unsigned int get_fault_insn(struct pt_regs *regs, unsigned int insn)
static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
unsigned int insn, unsigned long address)
{
- unsigned long g2;
unsigned char asi = ASI_P;
if ((!insn) && (regs->tstate & TSTATE_PRIV))
@@ -273,11 +221,9 @@ static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
}
}
- g2 = regs->u_regs[UREG_G2];
-
/* Is this in ex_table? */
if (regs->tstate & TSTATE_PRIV) {
- unsigned long fixup;
+ const struct exception_table_entry *entry;
if (asi == ASI_P && (insn & 0xc0800000) == 0xc0800000) {
if (insn & 0x2000)
@@ -288,10 +234,9 @@ static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
/* Look in asi.h: All _S asis have LS bit set */
if ((asi & 0x1) &&
- (fixup = search_extables_range(regs->tpc, &g2))) {
- regs->tpc = fixup;
+ (entry = search_exception_tables(regs->tpc))) {
+ regs->tpc = entry->fixup;
regs->tnpc = regs->tpc + 4;
- regs->u_regs[UREG_G2] = g2;
return;
}
} else {
@@ -461,7 +406,7 @@ good_area:
}
up_read(&mm->mmap_sem);
- goto fault_done;
+ return;
/*
* Something tried to access memory that isn't in our memory map..
@@ -473,8 +418,7 @@ bad_area:
handle_kernel_fault:
do_kernel_fault(regs, si_code, fault_code, insn, address);
-
- goto fault_done;
+ return;
/*
* We ran out of memory, or some other thing happened to us that made
@@ -505,9 +449,4 @@ do_sigbus:
/* Kernel mode? Handle exceptions or die */
if (regs->tstate & TSTATE_PRIV)
goto handle_kernel_fault;
-
-fault_done:
- /* These values are no longer needed, clear them. */
- set_thread_fault_code(0);
- current_thread_info()->fault_address = 0;
}