/*
* Written by Johan Rydberg, based on work by Daniel Kahlin.
* Rewritten by Eric Biederman
+ * 2005.12 yhlu add linuxbios_ram cross the vga font buffer handling
*/
/*
* We use ELF as output format. So that we can
_stack = .;
.stack . : {
/* Reserve a stack for each possible cpu */
- . = (CONFIG_MAX_CPUS * STACK_SIZE) ;
+ /* the stack for ap will be put after pgtbl in 1M to CONFIG_LB_MEM_TOPK range when VGA and ROM_RUN and CONFIG_LB_MEM_TOPK>1024*/
+ . = ((CONFIG_CONSOLE_VGA || CONFIG_PCI_ROM_RUN)&&(_RAMBASE<0x100000)&&((CONFIG_LB_MEM_TOPK<<10)>0x100000) ) ? STACK_SIZE : (CONFIG_MAX_CPUS*STACK_SIZE);
}
_estack = .;
- _heap = .;
- .heap . : {
- /* Reserve 256K for the heap */
- . = HEAP_SIZE ;
- . = ALIGN(4);
- }
- _eheap = .;
+ _heap = .;
+ .heap . : {
+ /* Reserve 256K for the heap */
+ . = HEAP_SIZE ;
+ . = ALIGN(4);
+ }
+ _eheap = .;
/* The ram segment
* This is all address of the memory resident copy of linuxBIOS.
*/
- _ram_seg = _text;
+ _ram_seg = _text;
_eram_seg = _eheap;
+
+ _bogus = ASSERT( !((CONFIG_CONSOLE_VGA || CONFIG_PCI_ROM_RUN) && ((_ram_seg<0xa0000) && (_eram_seg>0xa0000))) , "please increase CONFIG_LB_MEM_TOPK and if still fail, try to set _RAMBASE more than 1M");
+
/DISCARD/ : {
*(.comment)
*(.note)
#endif
);
}
+
+/* be warned, this file will be used by core other than core 0/node 0 or core0/node0 when cpu_reset*/
+static inline __attribute__((always_inline)) void set_1m_ram(void)
+{
+ __asm__ volatile (
+
+ /* disable cache */
+ "movl %%cr0, %%eax\n\t"
+ "orl $(0x1<<30),%%eax\n\t"
+ "movl %%eax, %%cr0\n\t"
+
+ /* enable caching for first 1M using variable mtrr */
+ "movl $0x200, %%ecx\n\t"
+ "xorl %%edx, %%edx\n\t"
+ "movl $(0 | 6), %%eax\n\t"
+// "movl $(0 | MTRR_TYPE_WRBACK), %%eax\n\t"
+ "wrmsr\n\t"
+
+ "movl $0x201, %%ecx\n\t"
+ "movl $0x0000000f, %%edx\n\t"
+#if CONFIG_USE_INIT
+ "movl %%esi, %%eax\n\t"
+#else
+ "movl $((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), %%eax\n\t"
+#endif
+ "wrmsr\n\t"
+
+ /* enable cache */
+ "movl %%cr0, %%eax\n\t"
+ "andl $0x9fffffff,%%eax\n\t"
+ "movl %%eax, %%cr0\n\t"
+// "invd\n\t" // Is the BSP done with mem init?
+ :
+ :
+#if CONFIG_USE_INIT
+ "S"((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800)
+#endif
+ );
+}
+
if(cpu_reset==0) { // cpu_reset don't need to clear it
clear_1m_ram();
}
-
-#if 0
- int i;
- for(i=0;i<0x800000;i++) {
- outb(0x66, 0x80);
+ else {
+ set_1m_ram();
}
-#endif
__asm__ volatile (
/* set new esp */ /* before _RAMBASE */
::"a"( (DCACHE_RAM_BASE + DCACHE_RAM_SIZE)- _RAMBASE )
);
- {
+ {
unsigned new_cpu_reset;
/* get back cpu_reset from ebx */
lapic_write(LAPIC_MSG_REG, (apicid<<24) | 0x44); // bsp can not check it before stop_this_cpu
disable_cache_as_ram(); // inline
+ set_1m_ram(); // inline
stop_this_cpu(); // inline, it will stop all cores except node0/core0 the bsp ....
}
+/*
+ 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>
#include <smp/spinlock.h>
#include <cpu/cpu.h>
-
#if CONFIG_SMP == 1
/* This is a lot more paranoid now, since Linux can NOT handle
* 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;
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;
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;
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;
/* 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();
#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
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
+/*
+ 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>
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;
projects / coreboot.git / commitdiff