* Synthesize TLB refill handlers at runtime.
*
* Copyright (C) 2004,2005 by Thiemo Seufer
+ * Copyright (C) 2005 Maciej W. Rozycki
*/
#include <stdarg.h>
insn_addu, insn_addiu, insn_and, insn_andi, insn_beq,
insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
insn_bne, insn_daddu, insn_daddiu, insn_dmfc0, insn_dmtc0,
- insn_dsll, insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32,
+ insn_dsll, insn_dsll32, insn_dsra, insn_dsrl,
insn_dsubu, insn_eret, insn_j, insn_jal, insn_jr, insn_ld,
insn_ll, insn_lld, insn_lui, insn_lw, insn_mfc0, insn_mtc0,
insn_ori, insn_rfe, insn_sc, insn_scd, insn_sd, insn_sll,
{ insn_dsll32, M(spec_op,0,0,0,0,dsll32_op), RT | RD | RE },
{ insn_dsra, M(spec_op,0,0,0,0,dsra_op), RT | RD | RE },
{ insn_dsrl, M(spec_op,0,0,0,0,dsrl_op), RT | RD | RE },
- { insn_dsrl32, M(spec_op,0,0,0,0,dsrl32_op), RT | RD | RE },
{ insn_dsubu, M(spec_op,0,0,0,0,dsubu_op), RS | RT | RD },
{ insn_eret, M(cop0_op,cop_op,0,0,0,eret_op), 0 },
{ insn_j, M(j_op,0,0,0,0,0), JIMM },
I_u2u1u3(_dsll32);
I_u2u1u3(_dsra);
I_u2u1u3(_dsrl);
-I_u2u1u3(_dsrl32);
I_u3u1u2(_dsubu);
I_0(_eret);
I_u1(_j);
label_nopage_tlbm,
label_smp_pgtable_change,
label_r3000_write_probe_fail,
- label_r3000_write_probe_ok
};
struct label {
L_LA(_nopage_tlbm)
L_LA(_smp_pgtable_change)
L_LA(_r3000_write_probe_fail)
-L_LA(_r3000_write_probe_ok)
/* convenience macros for instructions */
#ifdef CONFIG_64BIT
static __init int __attribute__((unused)) in_compat_space_p(long addr)
{
/* Is this address in 32bit compat space? */
- return (((addr) & 0xffffffff00000000) == 0xffffffff00000000);
+ return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
}
static __init int __attribute__((unused)) rel_highest(long val)
if (p > tlb_handler + 32)
panic("TLB refill handler space exceeded");
- printk("Synthesized TLB handler (%u instructions).\n",
+ printk("Synthesized TLB refill handler (%u instructions).\n",
(unsigned int)(p - tlb_handler));
#ifdef DEBUG_TLB
{
#endif
memcpy((void *)CAC_BASE, tlb_handler, 0x80);
- flush_icache_range(CAC_BASE, CAC_BASE + 0x80);
}
/*
static __init void __attribute__((unused)) build_tlb_probe_entry(u32 **p)
{
switch (current_cpu_data.cputype) {
+ /* Found by experiment: R4600 v2.0 needs this, too. */
+ case CPU_R4600:
case CPU_R5000:
case CPU_R5000A:
case CPU_NEVADA:
case CPU_R4700:
case CPU_R5000:
case CPU_R5000A:
+ i_nop(p);
+ tlbw(p);
+ i_nop(p);
+ break;
+
+ case CPU_R4300:
case CPU_5KC:
case CPU_TX49XX:
case CPU_AU1000:
case CPU_AU1100:
case CPU_AU1500:
case CPU_AU1550:
+ case CPU_AU1200:
+ case CPU_PR4450:
i_nop(p);
tlbw(p);
break;
case CPU_R12000:
case CPU_4KC:
case CPU_SB1:
+ case CPU_SB1A:
case CPU_4KSC:
case CPU_20KC:
case CPU_25KF:
case CPU_4KEC:
case CPU_24K:
+ case CPU_34K:
i_ehb(p);
tlbw(p);
break;
case CPU_VR4131:
case CPU_VR4133:
+ case CPU_R5432:
i_nop(p);
i_nop(p);
tlbw(p);
/* No i_nop needed here, since the next insn doesn't touch TMP. */
#ifdef CONFIG_SMP
+# ifdef CONFIG_BUILD_ELF64
/*
- * 64 bit SMP has the lower part of &pgd_current[smp_processor_id()]
+ * 64 bit SMP running in XKPHYS has smp_processor_id() << 3
* stored in CONTEXT.
*/
- if (in_compat_space_p(pgdc)) {
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_dsra(p, ptr, ptr, 23);
- i_ld(p, ptr, 0, ptr);
- } else {
-#ifdef CONFIG_BUILD_ELF64
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_dsrl(p, ptr, ptr, 23);
- i_dsll(p, ptr, ptr, 3);
- i_LA_mostly(p, tmp, pgdc);
- i_daddu(p, ptr, ptr, tmp);
- i_dmfc0(p, tmp, C0_BADVADDR);
- i_ld(p, ptr, rel_lo(pgdc), ptr);
-#else
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_lui(p, tmp, rel_highest(pgdc));
- i_dsll(p, ptr, ptr, 9);
- i_daddiu(p, tmp, tmp, rel_higher(pgdc));
- i_dsrl32(p, ptr, ptr, 0);
- i_and(p, ptr, ptr, tmp);
- i_dmfc0(p, tmp, C0_BADVADDR);
- i_ld(p, ptr, 0, ptr);
-#endif
- }
+ i_dmfc0(p, ptr, C0_CONTEXT);
+ i_dsrl(p, ptr, ptr, 23);
+ i_LA_mostly(p, tmp, pgdc);
+ i_daddu(p, ptr, ptr, tmp);
+ i_dmfc0(p, tmp, C0_BADVADDR);
+ i_ld(p, ptr, rel_lo(pgdc), ptr);
+# else
+ /*
+ * 64 bit SMP running in compat space has the lower part of
+ * &pgd_current[smp_processor_id()] stored in CONTEXT.
+ */
+ if (!in_compat_space_p(pgdc))
+ panic("Invalid page directory address!");
+
+ i_dmfc0(p, ptr, C0_CONTEXT);
+ i_dsra(p, ptr, ptr, 23);
+ i_ld(p, ptr, 0, ptr);
+# endif
#else
i_LA_mostly(p, ptr, pgdc);
i_ld(p, ptr, rel_lo(pgdc), ptr);
i_mfc0(p, ptr, C0_CONTEXT);
i_LA_mostly(p, tmp, pgdc);
i_srl(p, ptr, ptr, 23);
- i_sll(p, ptr, ptr, 2);
i_addu(p, ptr, tmp, ptr);
#else
i_LA_mostly(p, ptr, pgdc);
{
int i;
- for (i = 0; i < 64; i++)
- printk("%08x\n", final_handler[i]);
+ f = final_handler;
+#ifdef CONFIG_64BIT
+ if (final_len > 32)
+ final_len = 64;
+ else
+ f = final_handler + 32;
+#endif /* CONFIG_64BIT */
+ for (i = 0; i < final_len; i++)
+ printk("%08x\n", f[i]);
}
#endif
memcpy((void *)CAC_BASE, final_handler, 0x100);
- flush_icache_range(CAC_BASE, CAC_BASE + 0x100);
}
/*
u32 __tlb_handler_align handle_tlbm[FASTPATH_SIZE];
static void __init
-iPTE_LW(u32 **p, struct label **l, unsigned int pte, int offset,
- unsigned int ptr)
+iPTE_LW(u32 **p, struct label **l, unsigned int pte, unsigned int ptr)
{
#ifdef CONFIG_SMP
# ifdef CONFIG_64BIT_PHYS_ADDR
if (cpu_has_64bits)
- i_lld(p, pte, offset, ptr);
+ i_lld(p, pte, 0, ptr);
else
# endif
- i_LL(p, pte, offset, ptr);
+ i_LL(p, pte, 0, ptr);
#else
# ifdef CONFIG_64BIT_PHYS_ADDR
if (cpu_has_64bits)
- i_ld(p, pte, offset, ptr);
+ i_ld(p, pte, 0, ptr);
else
# endif
- i_LW(p, pte, offset, ptr);
+ i_LW(p, pte, 0, ptr);
#endif
}
static void __init
-iPTE_SW(u32 **p, struct reloc **r, unsigned int pte, int offset,
- unsigned int ptr)
+iPTE_SW(u32 **p, struct reloc **r, unsigned int pte, unsigned int ptr,
+ unsigned int mode)
{
+#ifdef CONFIG_64BIT_PHYS_ADDR
+ unsigned int hwmode = mode & (_PAGE_VALID | _PAGE_DIRTY);
+#endif
+
+ i_ori(p, pte, pte, mode);
#ifdef CONFIG_SMP
# ifdef CONFIG_64BIT_PHYS_ADDR
if (cpu_has_64bits)
- i_scd(p, pte, offset, ptr);
+ i_scd(p, pte, 0, ptr);
else
# endif
- i_SC(p, pte, offset, ptr);
+ i_SC(p, pte, 0, ptr);
if (r10000_llsc_war())
il_beqzl(p, r, pte, label_smp_pgtable_change);
if (!cpu_has_64bits) {
/* no i_nop needed */
i_ll(p, pte, sizeof(pte_t) / 2, ptr);
- i_ori(p, pte, pte, _PAGE_VALID);
+ i_ori(p, pte, pte, hwmode);
i_sc(p, pte, sizeof(pte_t) / 2, ptr);
il_beqz(p, r, pte, label_smp_pgtable_change);
/* no i_nop needed */
#else
# ifdef CONFIG_64BIT_PHYS_ADDR
if (cpu_has_64bits)
- i_sd(p, pte, offset, ptr);
+ i_sd(p, pte, 0, ptr);
else
# endif
- i_SW(p, pte, offset, ptr);
+ i_SW(p, pte, 0, ptr);
# ifdef CONFIG_64BIT_PHYS_ADDR
if (!cpu_has_64bits) {
i_lw(p, pte, sizeof(pte_t) / 2, ptr);
- i_ori(p, pte, pte, _PAGE_VALID);
+ i_ori(p, pte, pte, hwmode);
i_sw(p, pte, sizeof(pte_t) / 2, ptr);
i_lw(p, pte, 0, ptr);
}
i_andi(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
i_xori(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
il_bnez(p, r, pte, lid);
- iPTE_LW(p, l, pte, 0, ptr);
+ iPTE_LW(p, l, pte, ptr);
}
/* Make PTE valid, store result in PTR. */
build_make_valid(u32 **p, struct reloc **r, unsigned int pte,
unsigned int ptr)
{
- i_ori(p, pte, pte, _PAGE_VALID | _PAGE_ACCESSED);
- iPTE_SW(p, r, pte, 0, ptr);
+ unsigned int mode = _PAGE_VALID | _PAGE_ACCESSED;
+
+ iPTE_SW(p, r, pte, ptr, mode);
}
/*
i_andi(p, pte, pte, _PAGE_PRESENT | _PAGE_WRITE);
i_xori(p, pte, pte, _PAGE_PRESENT | _PAGE_WRITE);
il_bnez(p, r, pte, lid);
- iPTE_LW(p, l, pte, 0, ptr);
+ iPTE_LW(p, l, pte, ptr);
}
/* Make PTE writable, update software status bits as well, then store
build_make_write(u32 **p, struct reloc **r, unsigned int pte,
unsigned int ptr)
{
- i_ori(p, pte, pte,
- _PAGE_ACCESSED | _PAGE_MODIFIED | _PAGE_VALID | _PAGE_DIRTY);
- iPTE_SW(p, r, pte, 0, ptr);
+ unsigned int mode = (_PAGE_ACCESSED | _PAGE_MODIFIED | _PAGE_VALID
+ | _PAGE_DIRTY);
+
+ iPTE_SW(p, r, pte, ptr, mode);
}
/*
{
i_andi(p, pte, pte, _PAGE_WRITE);
il_beqz(p, r, pte, lid);
- iPTE_LW(p, l, pte, 0, ptr);
+ iPTE_LW(p, l, pte, ptr);
}
/*
* R3000 style TLB load/store/modify handlers.
*/
-/* This places the pte in the page table at PTR into ENTRYLO0. */
+/*
+ * This places the pte into ENTRYLO0 and writes it with tlbwi.
+ * Then it returns.
+ */
static void __init
-build_r3000_pte_reload(u32 **p, unsigned int ptr)
+build_r3000_pte_reload_tlbwi(u32 **p, unsigned int pte, unsigned int tmp)
{
- i_lw(p, ptr, 0, ptr);
- i_nop(p); /* load delay */
- i_mtc0(p, ptr, C0_ENTRYLO0);
- i_nop(p); /* cp0 delay */
+ i_mtc0(p, pte, C0_ENTRYLO0); /* cp0 delay */
+ i_mfc0(p, tmp, C0_EPC); /* cp0 delay */
+ i_tlbwi(p);
+ i_jr(p, tmp);
+ i_rfe(p); /* branch delay */
}
/*
- * The index register may have the probe fail bit set,
- * because we would trap on access kseg2, i.e. without refill.
+ * This places the pte into ENTRYLO0 and writes it with tlbwi
+ * or tlbwr as appropriate. This is because the index register
+ * may have the probe fail bit set as a result of a trap on a
+ * kseg2 access, i.e. without refill. Then it returns.
*/
static void __init
-build_r3000_tlb_write(u32 **p, struct label **l, struct reloc **r,
- unsigned int tmp)
+build_r3000_tlb_reload_write(u32 **p, struct label **l, struct reloc **r,
+ unsigned int pte, unsigned int tmp)
{
i_mfc0(p, tmp, C0_INDEX);
- i_nop(p); /* cp0 delay */
- il_bltz(p, r, tmp, label_r3000_write_probe_fail);
- i_nop(p); /* branch delay */
- i_tlbwi(p);
- il_b(p, r, label_r3000_write_probe_ok);
- i_nop(p); /* branch delay */
+ i_mtc0(p, pte, C0_ENTRYLO0); /* cp0 delay */
+ il_bltz(p, r, tmp, label_r3000_write_probe_fail); /* cp0 delay */
+ i_mfc0(p, tmp, C0_EPC); /* branch delay */
+ i_tlbwi(p); /* cp0 delay */
+ i_jr(p, tmp);
+ i_rfe(p); /* branch delay */
l_r3000_write_probe_fail(l, *p);
- i_tlbwr(p);
- l_r3000_write_probe_ok(l, *p);
+ i_tlbwr(p); /* cp0 delay */
+ i_jr(p, tmp);
+ i_rfe(p); /* branch delay */
}
static void __init
i_andi(p, pte, pte, 0xffc); /* load delay */
i_addu(p, ptr, ptr, pte);
i_lw(p, pte, 0, ptr);
- i_nop(p); /* load delay */
- i_tlbp(p);
-}
-
-static void __init
-build_r3000_tlbchange_handler_tail(u32 **p, unsigned int tmp)
-{
- i_mfc0(p, tmp, C0_EPC);
- i_nop(p); /* cp0 delay */
- i_jr(p, tmp);
- i_rfe(p); /* branch delay */
+ i_tlbp(p); /* load delay */
}
static void __init build_r3000_tlb_load_handler(void)
build_r3000_tlbchange_handler_head(&p, K0, K1);
build_pte_present(&p, &l, &r, K0, K1, label_nopage_tlbl);
+ i_nop(&p); /* load delay */
build_make_valid(&p, &r, K0, K1);
- build_r3000_pte_reload(&p, K1);
- build_r3000_tlb_write(&p, &l, &r, K0);
- build_r3000_tlbchange_handler_tail(&p, K0);
+ build_r3000_tlb_reload_write(&p, &l, &r, K0, K1);
l_nopage_tlbl(&l, p);
i_j(&p, (unsigned long)tlb_do_page_fault_0 & 0x0fffffff);
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbl); i++)
printk("%08x\n", handle_tlbl[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbl,
- (unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r3000_tlb_store_handler(void)
build_r3000_tlbchange_handler_head(&p, K0, K1);
build_pte_writable(&p, &l, &r, K0, K1, label_nopage_tlbs);
+ i_nop(&p); /* load delay */
build_make_write(&p, &r, K0, K1);
- build_r3000_pte_reload(&p, K1);
- build_r3000_tlb_write(&p, &l, &r, K0);
- build_r3000_tlbchange_handler_tail(&p, K0);
+ build_r3000_tlb_reload_write(&p, &l, &r, K0, K1);
l_nopage_tlbs(&l, p);
i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff);
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbs); i++)
printk("%08x\n", handle_tlbs[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbs,
- (unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r3000_tlb_modify_handler(void)
build_r3000_tlbchange_handler_head(&p, K0, K1);
build_pte_modifiable(&p, &l, &r, K0, K1, label_nopage_tlbm);
+ i_nop(&p); /* load delay */
build_make_write(&p, &r, K0, K1);
- build_r3000_pte_reload(&p, K1);
- i_tlbwi(&p);
- build_r3000_tlbchange_handler_tail(&p, K0);
+ build_r3000_pte_reload_tlbwi(&p, K0, K1);
l_nopage_tlbm(&l, p);
i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff);
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbm); i++)
printk("%08x\n", handle_tlbm[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbm,
- (unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
}
/*
#ifdef CONFIG_SMP
l_smp_pgtable_change(l, *p);
# endif
- iPTE_LW(p, l, pte, 0, ptr); /* get even pte */
+ iPTE_LW(p, l, pte, ptr); /* get even pte */
build_tlb_probe_entry(p);
}
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbl); i++)
printk("%08x\n", handle_tlbl[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbl,
- (unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r4000_tlb_store_handler(void)
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbs); i++)
printk("%08x\n", handle_tlbs[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbs,
- (unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
}
static void __init build_r4000_tlb_modify_handler(void)
{
int i;
- for (i = 0; i < FASTPATH_SIZE; i++)
+ for (i = 0; i < (p - handle_tlbm); i++)
printk("%08x\n", handle_tlbm[i]);
}
#endif
-
- flush_icache_range((unsigned long)handle_tlbm,
- (unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
}
void __init build_tlb_refill_handler(void)
}
}
}
+
+void __init flush_tlb_handlers(void)
+{
+ flush_icache_range((unsigned long)handle_tlbl,
+ (unsigned long)handle_tlbl + sizeof(handle_tlbl));
+ flush_icache_range((unsigned long)handle_tlbs,
+ (unsigned long)handle_tlbs + sizeof(handle_tlbs));
+ flush_icache_range((unsigned long)handle_tlbm,
+ (unsigned long)handle_tlbm + sizeof(handle_tlbm));
+}
projects / karo-tx-linux.git / blobdiff