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authorYinghai Lu <yinghai@kernel.org>2009-11-24 02:48:18 -0800
committerIngo Molnar <mingo@elte.hu>2009-11-24 12:10:51 +0100
commitb24c2a925a9837cccf54d50aeac22ba0cbc15455 (patch)
tree41da574f9dd4c39c290fd0480cb615d808b84cb5 /arch/x86/kernel/mpparse.c
parenteb41c8be89dbe079f49202774e04a79ccac48a09 (diff)
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x86: Move find_smp_config() earlier and avoid bootmem usage
Move the find_smp_config() call to before bootmem is initialized. Use reserve_early() instead of reserve_bootmem() in it. This simplifies the code, we only need to call find_smp_config() once and can remove the now unneeded reserve parameter from x86_init_mpparse::find_smp_config. We thus also reduce x86's dependency on bootmem allocations. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B0BB9F2.70907@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/mpparse.c')
-rw-r--r--arch/x86/kernel/mpparse.c44
1 files changed, 12 insertions, 32 deletions
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 5be95ef4ffec..35a57c963df9 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -667,36 +667,18 @@ void __init default_get_smp_config(unsigned int early)
*/
}
-static void __init smp_reserve_bootmem(struct mpf_intel *mpf)
+static void __init smp_reserve_memory(struct mpf_intel *mpf)
{
unsigned long size = get_mpc_size(mpf->physptr);
-#ifdef CONFIG_X86_32
- /*
- * We cannot access to MPC table to compute table size yet,
- * as only few megabytes from the bottom is mapped now.
- * PC-9800's MPC table places on the very last of physical
- * memory; so that simply reserving PAGE_SIZE from mpf->physptr
- * yields BUG() in reserve_bootmem.
- * also need to make sure physptr is below than max_low_pfn
- * we don't need reserve the area above max_low_pfn
- */
- unsigned long end = max_low_pfn * PAGE_SIZE;
- if (mpf->physptr < end) {
- if (mpf->physptr + size > end)
- size = end - mpf->physptr;
- reserve_bootmem_generic(mpf->physptr, size, BOOTMEM_DEFAULT);
- }
-#else
- reserve_bootmem_generic(mpf->physptr, size, BOOTMEM_DEFAULT);
-#endif
+ reserve_early(mpf->physptr, mpf->physptr+size, "MP-table mpc");
}
-static int __init smp_scan_config(unsigned long base, unsigned long length,
- unsigned reserve)
+static int __init smp_scan_config(unsigned long base, unsigned long length)
{
unsigned int *bp = phys_to_virt(base);
struct mpf_intel *mpf;
+ unsigned long mem;
apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n",
bp, length);
@@ -717,12 +699,10 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
printk(KERN_INFO "found SMP MP-table at [%p] %llx\n",
mpf, (u64)virt_to_phys(mpf));
- if (!reserve)
- return 1;
- reserve_bootmem_generic(virt_to_phys(mpf), sizeof(*mpf),
- BOOTMEM_DEFAULT);
+ mem = virt_to_phys(mpf);
+ reserve_early(mem, mem + sizeof(*mpf), "MP-table mpf");
if (mpf->physptr)
- smp_reserve_bootmem(mpf);
+ smp_reserve_memory(mpf);
return 1;
}
@@ -732,7 +712,7 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
return 0;
}
-void __init default_find_smp_config(unsigned int reserve)
+void __init default_find_smp_config(void)
{
unsigned int address;
@@ -744,9 +724,9 @@ void __init default_find_smp_config(unsigned int reserve)
* 2) Scan the top 1K of base RAM
* 3) Scan the 64K of bios
*/
- if (smp_scan_config(0x0, 0x400, reserve) ||
- smp_scan_config(639 * 0x400, 0x400, reserve) ||
- smp_scan_config(0xF0000, 0x10000, reserve))
+ if (smp_scan_config(0x0, 0x400) ||
+ smp_scan_config(639 * 0x400, 0x400) ||
+ smp_scan_config(0xF0000, 0x10000))
return;
/*
* If it is an SMP machine we should know now, unless the
@@ -767,7 +747,7 @@ void __init default_find_smp_config(unsigned int reserve)
address = get_bios_ebda();
if (address)
- smp_scan_config(address, 0x400, reserve);
+ smp_scan_config(address, 0x400);
}
#ifdef CONFIG_X86_IO_APIC
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