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x86: add early flags to mpparse_32.c

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Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexey Starikovskiy 2008-04-04 23:42:09 +04:00 committed by Ingo Molnar
parent 4ef81297f7
commit 888032cd23
1 changed files with 47 additions and 10 deletions
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57
arch/x86/kernel/mpparse_32.c
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@ -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);
}
/* --------------------------------------------------------------------------