#include <asm/page.h>
#include <asm/pgtable.h>
-#include <asm/memreg.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/smp.h>
#include <asm/traps.h>
#include <asm/uaccess.h>
-extern int prom_node_root;
-
int show_unhandled_signals = 1;
/* At boot time we determine these two values necessary for setting
* up the segment maps and page table entries (pte's).
*/
-int num_segmaps, num_contexts;
-int invalid_segment;
-
-/* various Virtual Address Cache parameters we find at boot time... */
-
-int vac_size, vac_linesize, vac_do_hw_vac_flushes;
-int vac_entries_per_context, vac_entries_per_segment;
-int vac_entries_per_page;
+int num_contexts;
/* Return how much physical memory we have. */
unsigned long probe_memory(void)
return total;
}
-extern void sun4c_complete_all_stores(void);
-
-/* Whee, a level 15 NMI interrupt memory error. Let's have fun... */
-asmlinkage void sparc_lvl15_nmi(struct pt_regs *regs, unsigned long serr,
- unsigned long svaddr, unsigned long aerr,
- unsigned long avaddr)
-{
- sun4c_complete_all_stores();
- printk("FAULT: NMI received\n");
- printk("SREGS: Synchronous Error %08lx\n", serr);
- printk(" Synchronous Vaddr %08lx\n", svaddr);
- printk(" Asynchronous Error %08lx\n", aerr);
- printk(" Asynchronous Vaddr %08lx\n", avaddr);
- if (sun4c_memerr_reg)
- printk(" Memory Parity Error %08lx\n", *sun4c_memerr_reg);
- printk("REGISTER DUMP:\n");
- show_regs(regs);
- prom_halt();
-}
-
static void unhandled_fault(unsigned long, struct task_struct *,
struct pt_regs *) __attribute__ ((noreturn));
-static void unhandled_fault(unsigned long address, struct task_struct *tsk,
- struct pt_regs *regs)
+static void __noreturn unhandled_fault(unsigned long address,
+ struct task_struct *tsk,
+ struct pt_regs *regs)
{
- if((unsigned long) address < PAGE_SIZE) {
+ if ((unsigned long) address < PAGE_SIZE) {
printk(KERN_ALERT
"Unable to handle kernel NULL pointer dereference\n");
} else {
- printk(KERN_ALERT "Unable to handle kernel paging request "
- "at virtual address %08lx\n", address);
+ printk(KERN_ALERT "Unable to handle kernel paging request at virtual address %08lx\n",
+ address);
}
printk(KERN_ALERT "tsk->{mm,active_mm}->context = %08lx\n",
(tsk->mm ? tsk->mm->context : tsk->active_mm->context));
printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %08lx\n",
(tsk->mm ? (unsigned long) tsk->mm->pgd :
- (unsigned long) tsk->active_mm->pgd));
+ (unsigned long) tsk->active_mm->pgd));
die_if_kernel("Oops", regs);
}
-asmlinkage int lookup_fault(unsigned long pc, unsigned long ret_pc,
+asmlinkage int lookup_fault(unsigned long pc, unsigned long ret_pc,
unsigned long address)
{
struct pt_regs regs;
unsigned long g2;
unsigned int insn;
int i;
-
+
i = search_extables_range(ret_pc, &g2);
switch (i) {
case 3:
/* for _from_ macros */
insn = *((unsigned int *) pc);
if (!((insn >> 21) & 1) || ((insn>>19)&0x3f) == 15)
- return 2;
- break;
+ return 2;
+ break;
default:
break;
}
- memset(®s, 0, sizeof (regs));
+ memset(®s, 0, sizeof(regs));
regs.pc = pc;
regs.npc = pc + 4;
__asm__ __volatile__(
if (text_fault)
return regs->pc;
- if (regs->psr & PSR_PS) {
+ if (regs->psr & PSR_PS)
insn = *(unsigned int *) regs->pc;
- } else {
+ else
__get_user(insn, (unsigned int *) regs->pc);
- }
return safe_compute_effective_address(regs, insn);
}
unsigned int flags = (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
(write ? FAULT_FLAG_WRITE : 0));
- if(text_fault)
+ if (text_fault)
address = regs->pc;
/*
* nothing more.
*/
code = SEGV_MAPERR;
- if (!ARCH_SUN4C && address >= TASK_SIZE)
+ if (address >= TASK_SIZE)
goto vmalloc_fault;
/*
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
- goto no_context;
+ if (in_atomic() || !mm)
+ goto no_context;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
down_read(&mm->mmap_sem);
- /*
- * The kernel referencing a bad kernel pointer can lock up
- * a sun4c machine completely, so we must attempt recovery.
- */
- if(!from_user && address >= PAGE_OFFSET)
+ if (!from_user && address >= PAGE_OFFSET)
goto bad_area;
vma = find_vma(mm, address);
- if(!vma)
+ if (!vma)
goto bad_area;
- if(vma->vm_start <= address)
+ if (vma->vm_start <= address)
goto good_area;
- if(!(vma->vm_flags & VM_GROWSDOWN))
+ if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
- if(expand_stack(vma, address))
+ if (expand_stack(vma, address))
goto bad_area;
/*
* Ok, we have a good vm_area for this memory access, so
*/
good_area:
code = SEGV_ACCERR;
- if(write) {
- if(!(vma->vm_flags & VM_WRITE))
+ if (write) {
+ if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
} else {
/* Allow reads even for write-only mappings */
- if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+ if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
g2 = regs->u_regs[UREG_G2];
if (!from_user) {
fixup = search_extables_range(regs->pc, &g2);
- if (fixup > 10) { /* Values below are reserved for other things */
+ /* Values below 10 are reserved for other things */
+ if (fixup > 10) {
extern const unsigned __memset_start[];
extern const unsigned __memset_end[];
extern const unsigned __csum_partial_copy_start[];
extern const unsigned __csum_partial_copy_end[];
#ifdef DEBUG_EXCEPTIONS
- printk("Exception: PC<%08lx> faddr<%08lx>\n", regs->pc, address);
+ printk("Exception: PC<%08lx> faddr<%08lx>\n",
+ regs->pc, address);
printk("EX_TABLE: insn<%08lx> fixup<%08x> g2<%08lx>\n",
regs->pc, fixup, g2);
#endif
regs->pc < (unsigned long)__memset_end) ||
(regs->pc >= (unsigned long)__csum_partial_copy_start &&
regs->pc < (unsigned long)__csum_partial_copy_end)) {
- regs->u_regs[UREG_I4] = address;
+ regs->u_regs[UREG_I4] = address;
regs->u_regs[UREG_I5] = regs->pc;
}
regs->u_regs[UREG_G2] = g2;
return;
}
}
-
- unhandled_fault (address, tsk, regs);
+
+ unhandled_fault(address, tsk, regs);
do_exit(SIGKILL);
/*
if (pmd_present(*pmd) || !pmd_present(*pmd_k))
goto bad_area_nosemaphore;
+
*pmd = *pmd_k;
return;
}
}
-asmlinkage void do_sun4c_fault(struct pt_regs *regs, int text_fault, int write,
- unsigned long address)
-{
- extern void sun4c_update_mmu_cache(struct vm_area_struct *,
- unsigned long,pte_t *);
- extern pte_t *sun4c_pte_offset_kernel(pmd_t *,unsigned long);
- struct task_struct *tsk = current;
- struct mm_struct *mm = tsk->mm;
- pgd_t *pgdp;
- pte_t *ptep;
-
- if (text_fault) {
- address = regs->pc;
- } else if (!write &&
- !(regs->psr & PSR_PS)) {
- unsigned int insn, __user *ip;
-
- ip = (unsigned int __user *)regs->pc;
- if (!get_user(insn, ip)) {
- if ((insn & 0xc1680000) == 0xc0680000)
- write = 1;
- }
- }
-
- if (!mm) {
- /* We are oopsing. */
- do_sparc_fault(regs, text_fault, write, address);
- BUG(); /* P3 Oops already, you bitch */
- }
-
- pgdp = pgd_offset(mm, address);
- ptep = sun4c_pte_offset_kernel((pmd_t *) pgdp, address);
-
- if (pgd_val(*pgdp)) {
- if (write) {
- if ((pte_val(*ptep) & (_SUN4C_PAGE_WRITE|_SUN4C_PAGE_PRESENT))
- == (_SUN4C_PAGE_WRITE|_SUN4C_PAGE_PRESENT)) {
- unsigned long flags;
-
- *ptep = __pte(pte_val(*ptep) | _SUN4C_PAGE_ACCESSED |
- _SUN4C_PAGE_MODIFIED |
- _SUN4C_PAGE_VALID |
- _SUN4C_PAGE_DIRTY);
-
- local_irq_save(flags);
- if (sun4c_get_segmap(address) != invalid_segment) {
- sun4c_put_pte(address, pte_val(*ptep));
- local_irq_restore(flags);
- return;
- }
- local_irq_restore(flags);
- }
- } else {
- if ((pte_val(*ptep) & (_SUN4C_PAGE_READ|_SUN4C_PAGE_PRESENT))
- == (_SUN4C_PAGE_READ|_SUN4C_PAGE_PRESENT)) {
- unsigned long flags;
-
- *ptep = __pte(pte_val(*ptep) | _SUN4C_PAGE_ACCESSED |
- _SUN4C_PAGE_VALID);
-
- local_irq_save(flags);
- if (sun4c_get_segmap(address) != invalid_segment) {
- sun4c_put_pte(address, pte_val(*ptep));
- local_irq_restore(flags);
- return;
- }
- local_irq_restore(flags);
- }
- }
- }
-
- /* This conditional is 'interesting'. */
- if (pgd_val(*pgdp) && !(write && !(pte_val(*ptep) & _SUN4C_PAGE_WRITE))
- && (pte_val(*ptep) & _SUN4C_PAGE_VALID))
- /* Note: It is safe to not grab the MMAP semaphore here because
- * we know that update_mmu_cache() will not sleep for
- * any reason (at least not in the current implementation)
- * and therefore there is no danger of another thread getting
- * on the CPU and doing a shrink_mmap() on this vma.
- */
- sun4c_update_mmu_cache (find_vma(current->mm, address), address,
- ptep);
- else
- do_sparc_fault(regs, text_fault, write, address);
-}
-
/* This always deals with user addresses. */
static void force_user_fault(unsigned long address, int write)
{
down_read(&mm->mmap_sem);
vma = find_vma(mm, address);
- if(!vma)
+ if (!vma)
goto bad_area;
- if(vma->vm_start <= address)
+ if (vma->vm_start <= address)
goto good_area;
- if(!(vma->vm_flags & VM_GROWSDOWN))
+ if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
- if(expand_stack(vma, address))
+ if (expand_stack(vma, address))
goto bad_area;
good_area:
code = SEGV_ACCERR;
- if(write) {
- if(!(vma->vm_flags & VM_WRITE))
+ if (write) {
+ if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
} else {
- if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+ if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
switch (handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0)) {
unsigned long sp;
sp = current_thread_info()->rwbuf_stkptrs[0];
- if(((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
+ if (((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
force_user_fault(sp + 0x38, 1);
force_user_fault(sp, 1);
void window_underflow_fault(unsigned long sp)
{
- if(((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
+ if (((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
force_user_fault(sp + 0x38, 0);
force_user_fault(sp, 0);
unsigned long sp;
sp = regs->u_regs[UREG_FP];
- if(((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
+ if (((sp + 0x38) & PAGE_MASK) != (sp & PAGE_MASK))
force_user_fault(sp + 0x38, 0);
force_user_fault(sp, 0);
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