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Diffstat (limited to 'arch/mips/lib/dump_tlb.c')
-rw-r--r--arch/mips/lib/dump_tlb.c184
1 files changed, 131 insertions, 53 deletions
diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
index 32b9f21bfd85..8ce97b8741fd 100644
--- a/arch/mips/lib/dump_tlb.c
+++ b/arch/mips/lib/dump_tlb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Dump R4x00 TLB for debugging purposes.
*
@@ -7,11 +8,41 @@
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <asm/hazards.h>
#include <asm/mipsregs.h>
+#include <asm/mmu_context.h>
#include <asm/page.h>
-#include <asm/pgtable.h>
#include <asm/tlbdebug.h>
+void dump_tlb_regs(void)
+{
+ const int field = 2 * sizeof(unsigned long);
+
+ pr_info("Index : %0x\n", read_c0_index());
+ pr_info("PageMask : %0x\n", read_c0_pagemask());
+ if (cpu_has_guestid)
+ pr_info("GuestCtl1: %0x\n", read_c0_guestctl1());
+ pr_info("EntryHi : %0*lx\n", field, read_c0_entryhi());
+ pr_info("EntryLo0 : %0*lx\n", field, read_c0_entrylo0());
+ pr_info("EntryLo1 : %0*lx\n", field, read_c0_entrylo1());
+ pr_info("Wired : %0x\n", read_c0_wired());
+ switch (current_cpu_type()) {
+ case CPU_R10000:
+ case CPU_R12000:
+ case CPU_R14000:
+ case CPU_R16000:
+ pr_info("FrameMask: %0x\n", read_c0_framemask());
+ break;
+ }
+ if (cpu_has_small_pages || cpu_has_rixi || cpu_has_xpa)
+ pr_info("PageGrain: %0x\n", read_c0_pagegrain());
+ if (cpu_has_htw) {
+ pr_info("PWField : %0*lx\n", field, read_c0_pwfield());
+ pr_info("PWSize : %0*lx\n", field, read_c0_pwsize());
+ pr_info("PWCtl : %0x\n", read_c0_pwctl());
+ }
+}
+
static inline const char *msk2str(unsigned int mask)
{
switch (mask) {
@@ -28,83 +59,130 @@ static inline const char *msk2str(unsigned int mask)
case PM_8M: return "8Mb";
case PM_32M: return "32Mb";
#endif
-#ifndef CONFIG_CPU_VR41XX
- case PM_1M: return "1Mb";
- case PM_4M: return "4Mb";
- case PM_16M: return "16Mb";
- case PM_64M: return "64Mb";
- case PM_256M: return "256Mb";
- case PM_1G: return "1Gb";
-#endif
}
return "";
}
-#define BARRIER() \
- __asm__ __volatile__( \
- ".set\tnoreorder\n\t" \
- "nop;nop;nop;nop;nop;nop;nop\n\t" \
- ".set\treorder");
-
static void dump_tlb(int first, int last)
{
- unsigned long s_entryhi, entryhi, asid;
- unsigned long long entrylo0, entrylo1;
- unsigned int s_index, s_pagemask, pagemask, c0, c1, i;
+ unsigned long s_entryhi, entryhi, asid, mmid;
+ unsigned long long entrylo0, entrylo1, pa;
+ unsigned int s_index, s_pagemask, s_guestctl1 = 0;
+ unsigned int pagemask, guestctl1 = 0, c0, c1, i;
+ unsigned long asidmask = cpu_asid_mask(&current_cpu_data);
+ int asidwidth = DIV_ROUND_UP(ilog2(asidmask) + 1, 4);
+ unsigned long s_mmid;
+#ifdef CONFIG_32BIT
+ bool xpa = cpu_has_xpa && (read_c0_pagegrain() & PG_ELPA);
+ int pwidth = xpa ? 11 : 8;
+ int vwidth = 8;
+#else
+ bool xpa = false;
+ int pwidth = 11;
+ int vwidth = 11;
+#endif
s_pagemask = read_c0_pagemask();
s_entryhi = read_c0_entryhi();
s_index = read_c0_index();
- asid = s_entryhi & 0xff;
+
+ if (cpu_has_mmid)
+ asid = s_mmid = read_c0_memorymapid();
+ else
+ asid = s_entryhi & asidmask;
+
+ if (cpu_has_guestid)
+ s_guestctl1 = read_c0_guestctl1();
for (i = first; i <= last; i++) {
write_c0_index(i);
- BARRIER();
+ mtc0_tlbr_hazard();
tlb_read();
- BARRIER();
+ tlb_read_hazard();
pagemask = read_c0_pagemask();
entryhi = read_c0_entryhi();
entrylo0 = read_c0_entrylo0();
entrylo1 = read_c0_entrylo1();
- /* Unused entries have a virtual address of CKSEG0. */
- if ((entryhi & ~0x1ffffUL) != CKSEG0
- && (entryhi & 0xff) == asid) {
-#ifdef CONFIG_32BIT
- int width = 8;
-#else
- int width = 11;
-#endif
- /*
- * Only print entries in use
- */
- printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
-
- c0 = (entrylo0 >> 3) & 7;
- c1 = (entrylo1 >> 3) & 7;
-
- printk("va=%0*lx asid=%02lx\n",
- width, (entryhi & ~0x1fffUL),
- entryhi & 0xff);
- printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ",
- width,
- (entrylo0 << 6) & PAGE_MASK, c0,
- (entrylo0 & 4) ? 1 : 0,
- (entrylo0 & 2) ? 1 : 0,
- (entrylo0 & 1) ? 1 : 0);
- printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n",
- width,
- (entrylo1 << 6) & PAGE_MASK, c1,
- (entrylo1 & 4) ? 1 : 0,
- (entrylo1 & 2) ? 1 : 0,
- (entrylo1 & 1) ? 1 : 0);
- }
+ if (cpu_has_mmid)
+ mmid = read_c0_memorymapid();
+ else
+ mmid = entryhi & asidmask;
+
+ if (cpu_has_guestid)
+ guestctl1 = read_c0_guestctl1();
+
+ /* EHINV bit marks entire entry as invalid */
+ if (cpu_has_tlbinv && entryhi & MIPS_ENTRYHI_EHINV)
+ continue;
+ /*
+ * Prior to tlbinv, unused entries have a virtual address of
+ * CKSEG0.
+ */
+ if ((entryhi & ~0x1ffffUL) == CKSEG0)
+ continue;
+ /*
+ * ASID takes effect in absence of G (global) bit.
+ * We check both G bits, even though architecturally they should
+ * match one another, because some revisions of the SB1 core may
+ * leave only a single G bit set after a machine check exception
+ * due to duplicate TLB entry.
+ */
+ if (!((entrylo0 | entrylo1) & ENTRYLO_G) && (mmid != asid))
+ continue;
+
+ /*
+ * Only print entries in use
+ */
+ printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
+
+ c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
+ c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
+
+ pr_cont("va=%0*lx asid=%0*lx",
+ vwidth, (entryhi & ~0x1fffUL),
+ asidwidth, mmid);
+ if (cpu_has_guestid)
+ pr_cont(" gid=%02lx",
+ (guestctl1 & MIPS_GCTL1_RID)
+ >> MIPS_GCTL1_RID_SHIFT);
+ /* RI/XI are in awkward places, so mask them off separately */
+ pa = entrylo0 & ~(MIPS_ENTRYLO_RI | MIPS_ENTRYLO_XI);
+ if (xpa)
+ pa |= (unsigned long long)readx_c0_entrylo0() << 30;
+ pa = (pa << 6) & PAGE_MASK;
+ pr_cont("\n\t[");
+ if (cpu_has_rixi)
+ pr_cont("ri=%d xi=%d ",
+ (entrylo0 & MIPS_ENTRYLO_RI) ? 1 : 0,
+ (entrylo0 & MIPS_ENTRYLO_XI) ? 1 : 0);
+ pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d] [",
+ pwidth, pa, c0,
+ (entrylo0 & ENTRYLO_D) ? 1 : 0,
+ (entrylo0 & ENTRYLO_V) ? 1 : 0,
+ (entrylo0 & ENTRYLO_G) ? 1 : 0);
+ /* RI/XI are in awkward places, so mask them off separately */
+ pa = entrylo1 & ~(MIPS_ENTRYLO_RI | MIPS_ENTRYLO_XI);
+ if (xpa)
+ pa |= (unsigned long long)readx_c0_entrylo1() << 30;
+ pa = (pa << 6) & PAGE_MASK;
+ if (cpu_has_rixi)
+ pr_cont("ri=%d xi=%d ",
+ (entrylo1 & MIPS_ENTRYLO_RI) ? 1 : 0,
+ (entrylo1 & MIPS_ENTRYLO_XI) ? 1 : 0);
+ pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d]\n",
+ pwidth, pa, c1,
+ (entrylo1 & ENTRYLO_D) ? 1 : 0,
+ (entrylo1 & ENTRYLO_V) ? 1 : 0,
+ (entrylo1 & ENTRYLO_G) ? 1 : 0);
}
printk("\n");
write_c0_entryhi(s_entryhi);
write_c0_index(s_index);
write_c0_pagemask(s_pagemask);
+ if (cpu_has_guestid)
+ write_c0_guestctl1(s_guestctl1);
}
void dump_tlb_all(void)
generated by cgit (git 2.34.1) at 2025-12-21 21:33:28 +0000