Revert "MIPS: Allow ASID size to be determined at boot time."
This reverts commit d532f3d26716a39dfd4b88d687bd344fbe77e390.
The original commit has several problems:
1) Doesn't work with 64-bit kernels.
2) Calls TLBMISS_HANDLER_SETUP() before the code is generated.
3) Calls TLBMISS_HANDLER_SETUP() twice in per_cpu_trap_init() when
only one call is needed.
[ralf@linux-mips.org: Also revert the bits of the ASID patch which were
hidden in the KVM merge.]
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: "Steven J. Hill" <Steven.Hill@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/5242/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
index 4a13c15..a63d1ed 100644
--- a/arch/mips/mm/tlb-r3k.c
+++ b/arch/mips/mm/tlb-r3k.c
@@ -51,7 +51,7 @@
#endif
local_irq_save(flags);
- old_ctx = ASID_MASK(read_c0_entryhi());
+ old_ctx = read_c0_entryhi() & ASID_MASK;
write_c0_entrylo0(0);
entry = r3k_have_wired_reg ? read_c0_wired() : 8;
for (; entry < current_cpu_data.tlbsize; entry++) {
@@ -87,13 +87,13 @@
#ifdef DEBUG_TLB
printk("[tlbrange<%lu,0x%08lx,0x%08lx>]",
- ASID_MASK(cpu_context(cpu, mm)), start, end);
+ cpu_context(cpu, mm) & ASID_MASK, start, end);
#endif
local_irq_save(flags);
size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
if (size <= current_cpu_data.tlbsize) {
- int oldpid = ASID_MASK(read_c0_entryhi());
- int newpid = ASID_MASK(cpu_context(cpu, mm));
+ int oldpid = read_c0_entryhi() & ASID_MASK;
+ int newpid = cpu_context(cpu, mm) & ASID_MASK;
start &= PAGE_MASK;
end += PAGE_SIZE - 1;
@@ -166,10 +166,10 @@
#ifdef DEBUG_TLB
printk("[tlbpage<%lu,0x%08lx>]", cpu_context(cpu, vma->vm_mm), page);
#endif
- newpid = ASID_MASK(cpu_context(cpu, vma->vm_mm));
+ newpid = cpu_context(cpu, vma->vm_mm) & ASID_MASK;
page &= PAGE_MASK;
local_irq_save(flags);
- oldpid = ASID_MASK(read_c0_entryhi());
+ oldpid = read_c0_entryhi() & ASID_MASK;
write_c0_entryhi(page | newpid);
BARRIER;
tlb_probe();
@@ -197,10 +197,10 @@
if (current->active_mm != vma->vm_mm)
return;
- pid = ASID_MASK(read_c0_entryhi());
+ pid = read_c0_entryhi() & ASID_MASK;
#ifdef DEBUG_TLB
- if ((pid != ASID_MASK(cpu_context(cpu, vma->vm_mm))) || (cpu_context(cpu, vma->vm_mm) == 0)) {
+ if ((pid != (cpu_context(cpu, vma->vm_mm) & ASID_MASK)) || (cpu_context(cpu, vma->vm_mm) == 0)) {
printk("update_mmu_cache: Wheee, bogus tlbpid mmpid=%lu tlbpid=%d\n",
(cpu_context(cpu, vma->vm_mm)), pid);
}
@@ -241,7 +241,7 @@
local_irq_save(flags);
/* Save old context and create impossible VPN2 value */
- old_ctx = ASID_MASK(read_c0_entryhi());
+ old_ctx = read_c0_entryhi() & ASID_MASK;
old_pagemask = read_c0_pagemask();
w = read_c0_wired();
write_c0_wired(w + 1);
@@ -264,7 +264,7 @@
#endif
local_irq_save(flags);
- old_ctx = ASID_MASK(read_c0_entryhi());
+ old_ctx = read_c0_entryhi() & ASID_MASK;
write_c0_entrylo0(entrylo0);
write_c0_entryhi(entryhi);
write_c0_index(wired);
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 09653b2..c643de4 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -287,7 +287,7 @@
ENTER_CRITICAL(flags);
- pid = ASID_MASK(read_c0_entryhi());
+ pid = read_c0_entryhi() & ASID_MASK;
address &= (PAGE_MASK << 1);
write_c0_entryhi(address | pid);
pgdp = pgd_offset(vma->vm_mm, address);
diff --git a/arch/mips/mm/tlb-r8k.c b/arch/mips/mm/tlb-r8k.c
index 122f920..91c2499 100644
--- a/arch/mips/mm/tlb-r8k.c
+++ b/arch/mips/mm/tlb-r8k.c
@@ -195,7 +195,7 @@
if (current->active_mm != vma->vm_mm)
return;
- pid = ASID_MASK(read_c0_entryhi());
+ pid = read_c0_entryhi() & ASID_MASK;
local_irq_save(flags);
address &= PAGE_MASK;
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 2ad41e9..ce9818e 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -29,7 +29,6 @@
#include <linux/init.h>
#include <linux/cache.h>
-#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#include <asm/pgtable.h>
#include <asm/war.h>
@@ -306,48 +305,6 @@
static int check_for_high_segbits __cpuinitdata;
#endif
-static void __cpuinit insn_fixup(unsigned int **start, unsigned int **stop,
- unsigned int i_const)
-{
- unsigned int **p, *ip;
-
- for (p = start; p < stop; p++) {
- ip = *p;
- *ip = (*ip & 0xffff0000) | i_const;
- }
- local_flush_icache_range((unsigned long)*p, (unsigned long)((*p) + 1));
-}
-
-#define asid_insn_fixup(section, const) \
-do { \
- extern unsigned int *__start_ ## section; \
- extern unsigned int *__stop_ ## section; \
- insn_fixup(&__start_ ## section, &__stop_ ## section, const); \
-} while(0)
-
-/*
- * Caller is assumed to flush the caches before the first context switch.
- */
-static void __cpuinit setup_asid(unsigned int inc, unsigned int mask,
- unsigned int version_mask,
- unsigned int first_version)
-{
- extern asmlinkage void handle_ri_rdhwr_vivt(void);
- unsigned long *vivt_exc;
-
- asid_insn_fixup(__asid_inc, inc);
- asid_insn_fixup(__asid_mask, mask);
- asid_insn_fixup(__asid_version_mask, version_mask);
- asid_insn_fixup(__asid_first_version, first_version);
-
- /* Patch up the 'handle_ri_rdhwr_vivt' handler. */
- vivt_exc = (unsigned long *) &handle_ri_rdhwr_vivt;
- vivt_exc++;
- *vivt_exc = (*vivt_exc & ~mask) | mask;
-
- current_cpu_data.asid_cache = first_version;
-}
-
static int check_for_high_segbits __cpuinitdata;
static unsigned int kscratch_used_mask __cpuinitdata;
@@ -2226,7 +2183,6 @@
case CPU_TX3922:
case CPU_TX3927:
#ifndef CONFIG_MIPS_PGD_C0_CONTEXT
- setup_asid(0x40, 0xfc0, 0xf000, ASID_FIRST_VERSION_R3000);
if (cpu_has_local_ebase)
build_r3000_tlb_refill_handler();
if (!run_once) {
@@ -2252,11 +2208,6 @@
break;
default:
-#ifndef CONFIG_MIPS_MT_SMTC
- setup_asid(0x1, 0xff, 0xff00, ASID_FIRST_VERSION_R4000);
-#else
- setup_asid(0x1, smtc_asid_mask, 0xff00, ASID_FIRST_VERSION_R4000);
-#endif
if (!run_once) {
scratch_reg = allocate_kscratch();
#ifdef CONFIG_MIPS_PGD_C0_CONTEXT