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issue 51 and 52: set mtrr for ap before stop it, and _RAMBASE above 1M

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support and pgtbl after 1M support


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2142 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Yinghai Lu
2005-12-14 02:39:33 +00:00
parent f42e1770f9
commit 72ee9b0ebe
7 changed files with 139 additions and 24 deletions
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57
src/cpu/x86/lapic/lapic_cpu_init.c
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@@ -1,3 +1,8 @@
/*
2005.12 yhlu add linuxbios_ram cross the vga font buffer handling
2005.12 yhlu add _RAMBASE above 1M support for SMP
*/
#include <cpu/x86/lapic.h>
#include <delay.h>
#include <string.h>
@@ -9,7 +14,6 @@
#include <smp/spinlock.h>
#include <cpu/cpu.h>
#if CONFIG_SMP == 1
/* This is a lot more paranoid now, since Linux can NOT handle
@@ -19,6 +23,32 @@
* We actually handling that case by noting which cpus startup
* and not telling anyone about the ones that dont.
*/
static unsigned long get_valid_start_eip(unsigned long orig_start_eip)
{
return (unsigned long)orig_start_eip & 0xfffff; // 20 bit
}
static void copy_secondary_start_to_1m_below(void)
{
#if _RAMBASE > 0x100000
extern char _secondary_start[];
extern char _secondary_start_end[];
unsigned long code_size;
unsigned long start_eip;
/* _secondary_start need to be masked 20 above bit, because 16 bit code in secondary.S
Also We need to copy the _secondary_start to the below 1M region
*/
start_eip = get_valid_start_eip((unsigned long)_secondary_start);
code_size = (unsigned long)_secondary_start_end - (unsigned long)_secondary_start;
/* copy the _secondary_start to the ram below 1M*/
memcpy(start_eip, (unsigned long)_secondary_start, code_size);
printk_debug("start_eip=0x%08lx, offset=0x%08lx, code_size=0x%08lx\n", start_eip, ((unsigned long)_secondary_start - start_eip), code_size);
#endif
}
static int lapic_start_cpu(unsigned long apicid)
{
int timeout;
@@ -87,8 +117,8 @@ static int lapic_start_cpu(unsigned long apicid)
return 0;
}
start_eip = (unsigned long)_secondary_start;
printk_spew("start_eip=0x%08lx\n", start_eip);
start_eip = get_valid_start_eip((unsigned long)_secondary_start);
printk_debug("start_eip=0x%08lx\n", start_eip);
num_starts = 2;
@@ -193,7 +223,25 @@ int start_cpu(device_t cpu)
index = ++last_cpu_index;
/* Find end of the new processors stack */
#if (CONFIG_LB_MEM_TOPK>1024) && (_RAMBASE < 0x100000) && ((CONFIG_CONSOLE_VGA==1) || (CONFIG_PCI_ROM_RUN == 1))
if(index<1) { // only keep bsp on low
stack_end = ((unsigned long)_estack) - (STACK_SIZE*index) - sizeof(struct cpu_info);
} else {
// for all APs, let use stack after pgtbl, 20480 is the pgtbl size for every cpu
stack_end = 0x100000+(20480 + STACK_SIZE)*CONFIG_MAX_CPUS - (STACK_SIZE*index);
#if (0x100000+(20480 + STACK_SIZE)*CONFIG_MAX_CPU) > (CONFIG_LB_MEM_TOPK<<10)
#warning "We may need to increase CONFIG_LB_MEM_TOPK, it need to be more than (0x100000+(20480 + STACK_SIZE)*CONFIG_MAX_CPU)\n"
#endif
if(stack_end > (CONFIG_LB_MEM_TOPK<<10)) {
printk_debug("start_cpu: Please increase the CONFIG_LB_MEM_TOPK more than %dK\n", stack_end>>10);
die("Can not go on\n");
}
stack_end -= sizeof(struct cpu_info);
}
#else
stack_end = ((unsigned long)_estack) - (STACK_SIZE*index) - sizeof(struct cpu_info);
#endif
/* Record the index and which cpu structure we are using */
info = (struct cpu_info *)stack_end;
@@ -251,6 +299,7 @@ static void initialize_other_cpus(struct bus *cpu_bus)
int old_active_count, active_count;
device_t cpu;
/* Loop through the cpus once getting them started */
for(cpu = cpu_bus->children; cpu ; cpu = cpu->sibling) {
if (cpu->path.type != DEVICE_PATH_APIC) {
continue;
@@ -327,6 +376,8 @@ void initialize_cpus(struct bus *cpu_bus)
/* Find the device structure for the boot cpu */
info->cpu = alloc_find_dev(cpu_bus, &cpu_path);
copy_secondary_start_to_1m_below(); // why here? In case some day we can start core1 in amd_sibling_init
/* Initialize the bootstrap processor */
cpu_initialize();

10
src/cpu/x86/lapic/secondary.S
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@@ -3,7 +3,7 @@
#include <cpu/x86/mtrr.h>
#include <cpu/x86/lapic_def.h>
.text
.globl _secondary_start
.globl _secondary_start, _secondary_start_end
.balign 4096
_secondary_start:
.code16
@@ -48,9 +48,9 @@ _secondary_start:
1: hlt
jmp 1b
gdtaddr:
.word gdt_limit /* the table limit */
.long gdt /* we know the offset */
gdtaddr:
.word gdt_limit /* the table limit */
.long gdt /* we know the offset */
_secondary_start_end:
.code32

22
src/cpu/x86/pae/pgtbl.c
View File

@@ -1,3 +1,7 @@
/*
2005.12 yhlu add linuxbios_ram cross the vga font buffer handling
*/
#include <console/console.h>
#include <cpu/cpu.h>
#include <cpu/x86/pae.h>
@@ -49,7 +53,25 @@ void *map_2M_page(unsigned long page)
struct pde pd[2048];
struct pde pdp[512];
} __attribute__ ((packed));
#if (CONFIG_LB_MEM_TOPK>1024) && (_RAMBASE<0x100000) && ((CONFIG_CONSOLE_VGA==1) || (CONFIG_PCI_ROM_RUN == 1))
/*
pgtbl is too big, so use last one 1M before CONFIG_LB_MEM_TOP, otherwise for 8 way dual core with vga support will push stack and heap cross 0xa0000,
and that region need to be used as vga font buffer. Please make sure set CONFIG_LB_MEM_TOPK=2048 in MB Config
*/
struct pg_table *pgtbl = 0x100000; //1M
unsigned x_end = 0x100000 + sizeof(struct pg_table) * CONFIG_MAX_CPUS;
#if (0x100000+20480*CONFIG_MAX_CPU) > (CONFIG_LB_MEM_TOPK<<10)
#warning "We may need to increase CONFIG_LB_MEM_TOPK, it need to be more than (0x100000+20480*CONFIG_MAX_CPU)\n"
#endif
if(x_end > (CONFIG_LB_MEM_TOPK<<10)) {
printk_debug("map_2M_page: Please increase the CONFIG_LB_MEM_TOPK more than %dK\n", x_end>>10);
die("Can not go on");
}
#else
static struct pg_table pgtbl[CONFIG_MAX_CPUS] __attribute__ ((aligned(4096)));
#endif
static unsigned long mapped_window[CONFIG_MAX_CPUS];
unsigned long index;
unsigned long window;