mirror of https://gitee.com/openkylin/linux.git
Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, asm: Use a lower case name for the end macro in atomic64_386_32.S x86, asm: Refactor atomic64_386_32.S to support old binutils and be cleaner x86: Document __phys_reloc_hide() usage in __pa_symbol() x86, apic: Map the local apic when parsing the MP table.
This commit is contained in:
Linus Torvalds
commit
c029b55af7
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@ -37,6 +37,13 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
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#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
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/* __pa_symbol should be used for C visible symbols.
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This seems to be the official gcc blessed way to do such arithmetic. */
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/*
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* We need __phys_reloc_hide() here because gcc may assume that there is no
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* overflow during __pa() calculation and can optimize it unexpectedly.
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* Newer versions of gcc provide -fno-strict-overflow switch to handle this
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* case properly. Once all supported versions of gcc understand it, we can
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* remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
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*/
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#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
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#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
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@ -1606,7 +1606,7 @@ void __init init_apic_mappings(void)
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* acpi lapic path already maps that address in
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* acpi_register_lapic_address()
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*/
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if (!acpi_lapic)
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if (!acpi_lapic && !smp_found_config)
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set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
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apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
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@ -274,6 +274,18 @@ static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
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void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
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static void __init smp_register_lapic_address(unsigned long address)
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{
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mp_lapic_addr = address;
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set_fixmap_nocache(FIX_APIC_BASE, address);
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if (boot_cpu_physical_apicid == -1U) {
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boot_cpu_physical_apicid = read_apic_id();
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apic_version[boot_cpu_physical_apicid] =
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GET_APIC_VERSION(apic_read(APIC_LVR));
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}
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}
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static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
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{
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char str[16];
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@ -295,6 +307,10 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
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if (early)
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return 1;
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/* Initialize the lapic mapping */
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if (!acpi_lapic)
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smp_register_lapic_address(mpc->lapic);
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if (mpc->oemptr)
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x86_init.mpparse.smp_read_mpc_oem(mpc);
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@ -25,150 +25,172 @@
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CFI_ADJUST_CFA_OFFSET -4
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.endm
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.macro BEGIN func reg
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$v = \reg
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#define BEGIN(op) \
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.macro endp; \
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CFI_ENDPROC; \
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ENDPROC(atomic64_##op##_386); \
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.purgem endp; \
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.endm; \
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ENTRY(atomic64_##op##_386); \
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CFI_STARTPROC; \
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LOCK v;
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ENTRY(atomic64_\func\()_386)
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CFI_STARTPROC
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LOCK $v
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#define ENDP endp
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.macro RETURN
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UNLOCK $v
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#define RET \
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UNLOCK v; \
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ret
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.endm
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.macro END_
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CFI_ENDPROC
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ENDPROC(atomic64_\func\()_386)
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.purgem RETURN
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.purgem END_
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.purgem END
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.endm
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#define RET_ENDP \
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RET; \
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ENDP
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.macro END
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RETURN
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END_
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.endm
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.endm
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#define v %ecx
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BEGIN(read)
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movl (v), %eax
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movl 4(v), %edx
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RET_ENDP
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#undef v
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BEGIN read %ecx
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movl ($v), %eax
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movl 4($v), %edx
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END
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#define v %esi
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BEGIN(set)
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movl %ebx, (v)
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movl %ecx, 4(v)
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RET_ENDP
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#undef v
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BEGIN set %esi
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movl %ebx, ($v)
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movl %ecx, 4($v)
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END
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#define v %esi
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BEGIN(xchg)
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movl (v), %eax
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movl 4(v), %edx
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movl %ebx, (v)
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movl %ecx, 4(v)
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RET_ENDP
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#undef v
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BEGIN xchg %esi
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movl ($v), %eax
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movl 4($v), %edx
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movl %ebx, ($v)
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movl %ecx, 4($v)
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END
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#define v %ecx
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BEGIN(add)
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addl %eax, (v)
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adcl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN add %ecx
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addl %eax, ($v)
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adcl %edx, 4($v)
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END
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#define v %ecx
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BEGIN(add_return)
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addl (v), %eax
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adcl 4(v), %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN add_return %ecx
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addl ($v), %eax
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adcl 4($v), %edx
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movl %eax, ($v)
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movl %edx, 4($v)
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END
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#define v %ecx
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BEGIN(sub)
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subl %eax, (v)
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sbbl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN sub %ecx
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subl %eax, ($v)
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sbbl %edx, 4($v)
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END
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BEGIN sub_return %ecx
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#define v %ecx
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BEGIN(sub_return)
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negl %edx
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negl %eax
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sbbl $0, %edx
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addl ($v), %eax
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adcl 4($v), %edx
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movl %eax, ($v)
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movl %edx, 4($v)
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END
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addl (v), %eax
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adcl 4(v), %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN inc %esi
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addl $1, ($v)
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adcl $0, 4($v)
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END
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#define v %esi
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BEGIN(inc)
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addl $1, (v)
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adcl $0, 4(v)
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RET_ENDP
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#undef v
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BEGIN inc_return %esi
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movl ($v), %eax
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movl 4($v), %edx
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#define v %esi
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BEGIN(inc_return)
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movl (v), %eax
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movl 4(v), %edx
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addl $1, %eax
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adcl $0, %edx
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movl %eax, ($v)
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movl %edx, 4($v)
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END
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN dec %esi
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subl $1, ($v)
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sbbl $0, 4($v)
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END
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#define v %esi
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BEGIN(dec)
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subl $1, (v)
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sbbl $0, 4(v)
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RET_ENDP
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#undef v
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BEGIN dec_return %esi
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movl ($v), %eax
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movl 4($v), %edx
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#define v %esi
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BEGIN(dec_return)
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movl (v), %eax
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movl 4(v), %edx
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subl $1, %eax
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sbbl $0, %edx
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movl %eax, ($v)
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movl %edx, 4($v)
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END
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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BEGIN add_unless %ecx
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#define v %ecx
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BEGIN(add_unless)
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addl %eax, %esi
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adcl %edx, %edi
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addl ($v), %eax
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adcl 4($v), %edx
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addl (v), %eax
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adcl 4(v), %edx
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cmpl %eax, %esi
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je 3f
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1:
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movl %eax, ($v)
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movl %edx, 4($v)
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movl %eax, (v)
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movl %edx, 4(v)
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movl $1, %eax
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2:
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RETURN
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RET
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3:
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cmpl %edx, %edi
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jne 1b
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xorl %eax, %eax
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jmp 2b
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END_
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ENDP
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#undef v
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BEGIN inc_not_zero %esi
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movl ($v), %eax
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movl 4($v), %edx
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#define v %esi
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BEGIN(inc_not_zero)
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movl (v), %eax
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movl 4(v), %edx
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testl %eax, %eax
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je 3f
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1:
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addl $1, %eax
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adcl $0, %edx
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movl %eax, ($v)
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movl %edx, 4($v)
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movl %eax, (v)
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movl %edx, 4(v)
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movl $1, %eax
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2:
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RETURN
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RET
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3:
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testl %edx, %edx
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jne 1b
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jmp 2b
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END_
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ENDP
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#undef v
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BEGIN dec_if_positive %esi
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movl ($v), %eax
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movl 4($v), %edx
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#define v %esi
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BEGIN(dec_if_positive)
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movl (v), %eax
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movl 4(v), %edx
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subl $1, %eax
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sbbl $0, %edx
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js 1f
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movl %eax, ($v)
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movl %edx, 4($v)
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movl %eax, (v)
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movl %edx, 4(v)
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1:
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END
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RET_ENDP
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#undef v
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