diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/page.h | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/mpparse.c | 16 | ||||
| -rw-r--r-- | arch/x86/lib/atomic64_386_32.S | 238 |
4 files changed, 154 insertions, 109 deletions
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h index 625c3f0e741..8ca82839288 100644 --- a/arch/x86/include/asm/page.h +++ b/arch/x86/include/asm/page.h @@ -37,6 +37,13 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr, #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) /* __pa_symbol should be used for C visible symbols. This seems to be the official gcc blessed way to do such arithmetic. */ +/* + * We need __phys_reloc_hide() here because gcc may assume that there is no + * overflow during __pa() calculation and can optimize it unexpectedly. + * Newer versions of gcc provide -fno-strict-overflow switch to handle this + * case properly. Once all supported versions of gcc understand it, we can + * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) + */ #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 980508c7908..e3b534cda49 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1606,7 +1606,7 @@ void __init init_apic_mappings(void) * acpi lapic path already maps that address in * acpi_register_lapic_address() */ - if (!acpi_lapic) + if (!acpi_lapic && !smp_found_config) set_fixmap_nocache(FIX_APIC_BASE, apic_phys); apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n", diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index d86dbf7e54b..d7b6f7fb4fe 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -274,6 +274,18 @@ static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt) void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { } +static void __init smp_register_lapic_address(unsigned long address) +{ + mp_lapic_addr = address; + + set_fixmap_nocache(FIX_APIC_BASE, address); + if (boot_cpu_physical_apicid == -1U) { + boot_cpu_physical_apicid = read_apic_id(); + apic_version[boot_cpu_physical_apicid] = + GET_APIC_VERSION(apic_read(APIC_LVR)); + } +} + static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early) { char str[16]; @@ -295,6 +307,10 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early) if (early) return 1; + /* Initialize the lapic mapping */ + if (!acpi_lapic) + smp_register_lapic_address(mpc->lapic); + if (mpc->oemptr) x86_init.mpparse.smp_read_mpc_oem(mpc); diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S index 4a5979aa688..2cda60a06e6 100644 --- a/arch/x86/lib/atomic64_386_32.S +++ b/arch/x86/lib/atomic64_386_32.S @@ -25,150 +25,172 @@ CFI_ADJUST_CFA_OFFSET -4 .endm -.macro BEGIN func reg -$v = \reg - -ENTRY(atomic64_\func\()_386) - CFI_STARTPROC - LOCK $v - -.macro RETURN - UNLOCK $v +#define BEGIN(op) \ +.macro endp; \ + CFI_ENDPROC; \ +ENDPROC(atomic64_##op##_386); \ +.purgem endp; \ +.endm; \ +ENTRY(atomic64_##op##_386); \ + CFI_STARTPROC; \ + LOCK v; + +#define ENDP endp + +#define RET \ + UNLOCK v; \ ret -.endm - -.macro END_ - CFI_ENDPROC -ENDPROC(atomic64_\func\()_386) -.purgem RETURN -.purgem END_ -.purgem END -.endm - -.macro END -RETURN -END_ -.endm -.endm -BEGIN read %ecx - movl ($v), %eax - movl 4($v), %edx -END - -BEGIN set %esi - movl %ebx, ($v) - movl %ecx, 4($v) -END - -BEGIN xchg %esi - movl ($v), %eax - movl 4($v), %edx - movl %ebx, ($v) - movl %ecx, 4($v) -END - -BEGIN add %ecx - addl %eax, ($v) - adcl %edx, 4($v) -END - -BEGIN add_return %ecx - addl ($v), %eax - adcl 4($v), %edx - movl %eax, ($v) - movl %edx, 4($v) -END - -BEGIN sub %ecx - subl %eax, ($v) - sbbl %edx, 4($v) -END - -BEGIN sub_return %ecx +#define RET_ENDP \ + RET; \ + ENDP + +#define v %ecx +BEGIN(read) + movl (v), %eax + movl 4(v), %edx +RET_ENDP +#undef v + +#define v %esi +BEGIN(set) + movl %ebx, (v) + movl %ecx, 4(v) +RET_ENDP +#undef v + +#define v %esi +BEGIN(xchg) + movl (v), %eax + movl 4(v), %edx + movl %ebx, (v) + movl %ecx, 4(v) +RET_ENDP +#undef v + +#define v %ecx +BEGIN(add) + addl %eax, (v) + adcl %edx, 4(v) +RET_ENDP +#undef v + +#define v %ecx +BEGIN(add_return) + addl (v), %eax + adcl 4(v), %edx + movl %eax, (v) + movl %edx, 4(v) +RET_ENDP +#undef v + +#define v %ecx +BEGIN(sub) + subl %eax, (v) + sbbl %edx, 4(v) +RET_ENDP +#undef v + +#define v %ecx +BEGIN(sub_return) negl %edx negl %eax sbbl $0, %edx - addl ($v), %eax - adcl 4($v), %edx - movl %eax, ($v) - movl %edx, 4($v) -END - -BEGIN inc %esi - addl $1, ($v) - adcl $0, 4($v) -END - -BEGIN inc_return %esi - movl ($v), %eax - movl 4($v), %edx + addl (v), %eax + adcl 4(v), %edx + movl %eax, (v) + movl %edx, 4(v) +RET_ENDP +#undef v + +#define v %esi +BEGIN(inc) + addl $1, (v) + adcl $0, 4(v) +RET_ENDP +#undef v + +#define v %esi +BEGIN(inc_return) + movl (v), %eax + movl 4(v), %edx addl $1, %eax adcl $0, %edx - movl %eax, ($v) - movl %edx, 4($v) -END - -BEGIN dec %esi - subl $1, ($v) - sbbl $0, 4($v) -END - -BEGIN dec_return %esi - movl ($v), %eax - movl 4($v), %edx + movl %eax, (v) + movl %edx, 4(v) +RET_ENDP +#undef v + +#define v %esi +BEGIN(dec) + subl $1, (v) + sbbl $0, 4(v) +RET_ENDP +#undef v + +#define v %esi +BEGIN(dec_return) + movl (v), %eax + movl 4(v), %edx subl $1, %eax sbbl $0, %edx - movl %eax, ($v) - movl %edx, 4($v) -END + movl %eax, (v) + movl %edx, 4(v) +RET_ENDP +#undef v -BEGIN add_unless %ecx +#define v %ecx +BEGIN(add_unless) addl %eax, %esi adcl %edx, %edi - addl ($v), %eax - adcl 4($v), %edx + addl (v), %eax + adcl 4(v), %edx cmpl %eax, %esi je 3f 1: - movl %eax, ($v) - movl %edx, 4($v) + movl %eax, (v) + movl %edx, 4(v) movl $1, %eax 2: -RETURN + RET 3: cmpl %edx, %edi jne 1b xorl %eax, %eax jmp 2b -END_ +ENDP +#undef v -BEGIN inc_not_zero %esi - movl ($v), %eax - movl 4($v), %edx +#define v %esi +BEGIN(inc_not_zero) + movl (v), %eax + movl 4(v), %edx testl %eax, %eax je 3f 1: addl $1, %eax adcl $0, %edx - movl %eax, ($v) - movl %edx, 4($v) + movl %eax, (v) + movl %edx, 4(v) movl $1, %eax 2: -RETURN + RET 3: testl %edx, %edx jne 1b jmp 2b -END_ +ENDP +#undef v -BEGIN dec_if_positive %esi - movl ($v), %eax - movl 4($v), %edx +#define v %esi +BEGIN(dec_if_positive) + movl (v), %eax + movl 4(v), %edx subl $1, %eax sbbl $0, %edx js 1f - movl %eax, ($v) - movl %edx, 4($v) + movl %eax, (v) + movl %edx, 4(v) 1: -END +RET_ENDP +#undef v |