diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/mpparse_32.c | 57 |
1 files changed, 47 insertions, 10 deletions
diff --git a/arch/x86/kernel/mpparse_32.c b/arch/x86/kernel/mpparse_32.c index f1c896ab827..6c9c2962190 100644 --- a/arch/x86/kernel/mpparse_32.c +++ b/arch/x86/kernel/mpparse_32.c @@ -329,7 +329,7 @@ static inline void mps_oem_check(struct mp_config_table *mpc, char *oem, * Read/parse the MPC */ -static int __init smp_read_mpc(struct mp_config_table *mpc) +static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early) { char str[16]; char oem[10]; @@ -373,6 +373,9 @@ static int __init smp_read_mpc(struct mp_config_table *mpc) if (!acpi_lapic) mp_lapic_addr = mpc->mpc_lapic; + if (early) + return 1; + /* * Now process the configuration blocks. */ @@ -622,10 +625,13 @@ static struct intel_mp_floating *mpf_found; /* * Scan the memory blocks for an SMP configuration block. */ -void __init get_smp_config(void) +static void __init __get_smp_config(unsigned early) { struct intel_mp_floating *mpf = mpf_found; + if (acpi_lapic && early) + return; + /* * ACPI supports both logical (e.g. Hyper-Threading) and physical * processors, where MPS only supports physical. @@ -652,6 +658,13 @@ void __init get_smp_config(void) * Now see if we need to read further. */ if (mpf->mpf_feature1 != 0) { + if (early) { + /* + * local APIC has default address + */ + mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; + return; + } printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1); @@ -663,7 +676,7 @@ void __init get_smp_config(void) * Read the physical hardware table. Anything here will * override the defaults. */ - if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr))) { + if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr), early)) { smp_found_config = 0; printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"); @@ -672,6 +685,8 @@ void __init get_smp_config(void) return; } + if (early) + return; #ifdef CONFIG_X86_IO_APIC /* * If there are no explicit MP IRQ entries, then we are @@ -695,13 +710,25 @@ void __init get_smp_config(void) } else BUG(); - printk(KERN_INFO "Processors: %d\n", num_processors); + if (!early) + printk(KERN_INFO "Processors: %d\n", num_processors); /* * Only use the first configuration found. */ } -static int __init smp_scan_config(unsigned long base, unsigned long length) +void __init early_get_smp_config(void) +{ + __get_smp_config(1); +} + +void __init get_smp_config(void) +{ + __get_smp_config(0); +} + +static int __init smp_scan_config(unsigned long base, unsigned long length, + unsigned reserve) { unsigned long *bp = phys_to_virt(base); struct intel_mp_floating *mpf; @@ -750,7 +777,7 @@ static int __init smp_scan_config(unsigned long base, unsigned long length) return 0; } -void __init find_smp_config(void) +static void __init __find_smp_config(unsigned reserve) { unsigned int address; @@ -762,9 +789,9 @@ void __init find_smp_config(void) * 2) Scan the top 1K of base RAM * 3) Scan the 64K of bios */ - if (smp_scan_config(0x0, 0x400) || - smp_scan_config(639 * 0x400, 0x400) || - smp_scan_config(0xF0000, 0x10000)) + if (smp_scan_config(0x0, 0x400, reserve) || + smp_scan_config(639 * 0x400, 0x400, reserve) || + smp_scan_config(0xF0000, 0x10000, reserve)) return; /* * If it is an SMP machine we should know now, unless the @@ -785,7 +812,17 @@ void __init find_smp_config(void) address = get_bios_ebda(); if (address) - smp_scan_config(address, 0x400); + smp_scan_config(address, 0x400, reserve); +} + +void __init early_find_smp_config(void) +{ + __find_smp_config(0); +} + +void __init find_smp_config(void) +{ + __find_smp_config(1); } /* -------------------------------------------------------------------------- |