diff options
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/pg-r4k.c | 66 | ||||
| -rw-r--r-- | arch/mips/mm/tlbex.c | 42 |
2 files changed, 61 insertions, 47 deletions
diff --git a/arch/mips/mm/pg-r4k.c b/arch/mips/mm/pg-r4k.c index 4f770ac885c..9185fbf37c0 100644 --- a/arch/mips/mm/pg-r4k.c +++ b/arch/mips/mm/pg-r4k.c @@ -4,6 +4,7 @@ * for more details. * * Copyright (C) 2003, 04, 05 Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2007 Maciej W. Rozycki */ #include <linux/init.h> #include <linux/kernel.h> @@ -12,6 +13,7 @@ #include <linux/module.h> #include <linux/proc_fs.h> +#include <asm/bugs.h> #include <asm/cacheops.h> #include <asm/inst.h> #include <asm/io.h> @@ -255,64 +257,58 @@ static inline void build_store_reg(int reg) __build_store_reg(reg); } -static inline void build_addiu_a2_a0(unsigned long offset) +static inline void build_addiu_rt_rs(unsigned int rt, unsigned int rs, + unsigned long offset) { union mips_instruction mi; BUG_ON(offset > 0x7fff); - mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op; - mi.i_format.rs = 4; /* $a0 */ - mi.i_format.rt = 6; /* $a2 */ - mi.i_format.simmediate = offset; + if (cpu_has_64bit_gp_regs && DADDI_WAR && r4k_daddiu_bug()) { + mi.i_format.opcode = addiu_op; + mi.i_format.rs = 0; /* $zero */ + mi.i_format.rt = 25; /* $t9 */ + mi.i_format.simmediate = offset; + emit_instruction(mi); + mi.r_format.opcode = spec_op; + mi.r_format.rs = rs; + mi.r_format.rt = 25; /* $t9 */ + mi.r_format.rd = rt; + mi.r_format.re = 0; + mi.r_format.func = daddu_op; + } else { + mi.i_format.opcode = cpu_has_64bit_gp_regs ? + daddiu_op : addiu_op; + mi.i_format.rs = rs; + mi.i_format.rt = rt; + mi.i_format.simmediate = offset; + } emit_instruction(mi); } -static inline void build_addiu_a2(unsigned long offset) +static inline void build_addiu_a2_a0(unsigned long offset) { - union mips_instruction mi; - - BUG_ON(offset > 0x7fff); - - mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op; - mi.i_format.rs = 6; /* $a2 */ - mi.i_format.rt = 6; /* $a2 */ - mi.i_format.simmediate = offset; + build_addiu_rt_rs(6, 4, offset); /* $a2, $a0, offset */ +} - emit_instruction(mi); +static inline void build_addiu_a2(unsigned long offset) +{ + build_addiu_rt_rs(6, 6, offset); /* $a2, $a2, offset */ } static inline void build_addiu_a1(unsigned long offset) { - union mips_instruction mi; - - BUG_ON(offset > 0x7fff); - - mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op; - mi.i_format.rs = 5; /* $a1 */ - mi.i_format.rt = 5; /* $a1 */ - mi.i_format.simmediate = offset; + build_addiu_rt_rs(5, 5, offset); /* $a1, $a1, offset */ load_offset -= offset; - - emit_instruction(mi); } static inline void build_addiu_a0(unsigned long offset) { - union mips_instruction mi; - - BUG_ON(offset > 0x7fff); - - mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op; - mi.i_format.rs = 4; /* $a0 */ - mi.i_format.rt = 4; /* $a0 */ - mi.i_format.simmediate = offset; + build_addiu_rt_rs(4, 4, offset); /* $a0, $a0, offset */ store_offset -= offset; - - emit_instruction(mi); } static inline void build_bne(unsigned int *dest) diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 511107f92d9..f8925ba0b39 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -6,7 +6,7 @@ * Synthesize TLB refill handlers at runtime. * * Copyright (C) 2004,2005,2006 by Thiemo Seufer - * Copyright (C) 2005 Maciej W. Rozycki + * Copyright (C) 2005, 2007 Maciej W. Rozycki * Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org) * * ... and the days got worse and worse and now you see @@ -27,6 +27,7 @@ #include <linux/string.h> #include <linux/init.h> +#include <asm/bugs.h> #include <asm/pgtable.h> #include <asm/cacheflush.h> #include <asm/mmu_context.h> @@ -293,7 +294,7 @@ static void __init build_insn(u32 **buf, enum opcode opc, ...) break; } - if (!ip) + if (!ip || (opc == insn_daddiu && r4k_daddiu_bug())) panic("Unsupported TLB synthesizer instruction %d", opc); op = ip->match; @@ -525,23 +526,33 @@ L_LA(_r3000_write_probe_fail) #define i_ssnop(buf) i_sll(buf, 0, 0, 1) #define i_ehb(buf) i_sll(buf, 0, 0, 3) -#ifdef CONFIG_64BIT static __init int __maybe_unused in_compat_space_p(long addr) { /* Is this address in 32bit compat space? */ +#ifdef CONFIG_64BIT return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L); +#else + return 1; +#endif } static __init int __maybe_unused rel_highest(long val) { +#ifdef CONFIG_64BIT return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000; +#else + return 0; +#endif } static __init int __maybe_unused rel_higher(long val) { +#ifdef CONFIG_64BIT return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000; -} +#else + return 0; #endif +} static __init int rel_hi(long val) { @@ -555,7 +566,6 @@ static __init int rel_lo(long val) static __init void i_LA_mostly(u32 **buf, unsigned int rs, long addr) { -#ifdef CONFIG_64BIT if (!in_compat_space_p(addr)) { i_lui(buf, rs, rel_highest(addr)); if (rel_higher(addr)) @@ -567,16 +577,18 @@ static __init void i_LA_mostly(u32 **buf, unsigned int rs, long addr) } else i_dsll32(buf, rs, rs, 0); } else -#endif i_lui(buf, rs, rel_hi(addr)); } -static __init void __maybe_unused i_LA(u32 **buf, unsigned int rs, - long addr) +static __init void __maybe_unused i_LA(u32 **buf, unsigned int rs, long addr) { i_LA_mostly(buf, rs, addr); - if (rel_lo(addr)) - i_ADDIU(buf, rs, rs, rel_lo(addr)); + if (rel_lo(addr)) { + if (!in_compat_space_p(addr)) + i_daddiu(buf, rs, rs, rel_lo(addr)); + else + i_addiu(buf, rs, rs, rel_lo(addr)); + } } /* @@ -1085,7 +1097,10 @@ build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r, } else { i_LA_mostly(p, ptr, modd); il_b(p, r, label_vmalloc_done); - i_daddiu(p, ptr, ptr, rel_lo(modd)); + if (in_compat_space_p(modd)) + i_addiu(p, ptr, ptr, rel_lo(modd)); + else + i_daddiu(p, ptr, ptr, rel_lo(modd)); } l_vmalloc(l, *p); @@ -1106,7 +1121,10 @@ build_get_pgd_vmalloc64(u32 **p, struct label **l, struct reloc **r, } else { i_LA_mostly(p, ptr, swpd); il_b(p, r, label_vmalloc_done); - i_daddiu(p, ptr, ptr, rel_lo(swpd)); + if (in_compat_space_p(swpd)) + i_addiu(p, ptr, ptr, rel_lo(swpd)); + else + i_daddiu(p, ptr, ptr, rel_lo(swpd)); } } |