mirror of
https://gitlab.com/qemu-project/qboot.git
synced 2024-02-13 08:33:40 +08:00
94d3b1b5d1
alloc buffer in fseg memory and fill it with smbios anchor and tables which read from the fw_cfg, then check type0 table and rebuild it if it's not exist. mainly inspired by the seabios, and borrowed some code from it. Reviewed-by: Ben Luo <luoben@linux.alibaba.com> Signed-off-by: kaihuan.pkh <kaihuan.pkh@alibaba-inc.com>
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
#include <stdbool.h>
|
|
#include "bios.h"
|
|
#include "stdio.h"
|
|
#include "e820.h"
|
|
#include "string.h"
|
|
#include "segment.h"
|
|
#include "fw_cfg.h"
|
|
#include "pci.h"
|
|
#include "benchmark.h"
|
|
#include "smbios.h"
|
|
|
|
static void set_realmode_int(int vec, void *p)
|
|
{
|
|
uint16_t *realmode_idt = (uint16_t *) 0;
|
|
realmode_idt[vec * 2] = flat_to_off16((uintptr_t) p);
|
|
realmode_idt[vec * 2 + 1] = flat_to_seg16((uintptr_t) p);
|
|
}
|
|
|
|
static void setup_idt(void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 0x100; i++)
|
|
set_realmode_int(i, bios_intfake);
|
|
for (i = 8; i < 16; i++)
|
|
set_realmode_int(i, bios_irq);
|
|
for (i = 0x70; i < 0x78; i++)
|
|
set_realmode_int(i, bios_irq);
|
|
set_realmode_int(0x10, bios_int10);
|
|
set_realmode_int(0x15, bios_int15);
|
|
}
|
|
|
|
/* Top of memory below 4GB. */
|
|
uint32_t lowmem;
|
|
struct e820map *e820;
|
|
static bool have_mmconfig;
|
|
|
|
static void extract_e820(void)
|
|
{
|
|
int id = fw_cfg_file_id("etc/e820");
|
|
uint32_t size;
|
|
int nr_map;
|
|
int i;
|
|
|
|
if (id == -1)
|
|
panic();
|
|
|
|
size = fw_cfg_file_size(id);
|
|
nr_map = size / sizeof(e820->map[0]) + 5;
|
|
|
|
e820 = malloc(offsetof(struct e820map, map[nr_map]));
|
|
e820->nr_map = nr_map;
|
|
e820->map[0] = (struct e820entry)
|
|
{ .addr = 0, .size = 639 * 1024, .type = E820_RAM }; /* low RAM */
|
|
e820->map[1] = (struct e820entry)
|
|
{ .addr = 639 * 1024, .size = 1024, .type = E820_RESERVED }; /* EBDA */
|
|
e820->map[2] = (struct e820entry)
|
|
{ .addr = 0xd0000, .size = 128 * 1024, .type = E820_NVS }; /* ACPI tables */
|
|
e820->map[3] = (struct e820entry)
|
|
{ .addr = 0xf0000, .size = 64 * 1024, .type = E820_RESERVED }; /* firmware */
|
|
|
|
i = 4;
|
|
if (have_mmconfig)
|
|
e820->map[i++] = (struct e820entry)
|
|
{ .addr = PCIE_MMCONFIG_BASE, .size = PCIE_MMCONFIG_SIZE, .type = E820_RESERVED };
|
|
else
|
|
nr_map--;
|
|
|
|
fw_cfg_read_file(id, &e820->map[i], size);
|
|
for (; i < e820->nr_map; i++)
|
|
if (e820->map[i].addr == 0) {
|
|
lowmem = e820->map[i].size;
|
|
e820->map[i].addr = 1024 * 1024;
|
|
e820->map[i].size -= 1024 * 1024;
|
|
break;
|
|
}
|
|
|
|
e820_seg = ((uintptr_t) e820) >> 4;
|
|
}
|
|
|
|
int __attribute__ ((section (".text.startup"))) main(void)
|
|
{
|
|
bool have_pci;
|
|
#ifdef BENCHMARK_HACK
|
|
outb(FW_EXIT_PORT, FW_START);
|
|
#endif
|
|
have_pci = setup_hw();
|
|
|
|
// Only the 16-bit trampoline for vmlinuz and the 16-bit interrupt
|
|
// handlers need to run from the F-segment, but keep things simple
|
|
// and jump there. From this point we can modify global variables.
|
|
asm("ljmp $0x8, $1f; 1:");
|
|
|
|
have_mmconfig = setup_mmconfig();
|
|
if (have_pci) {
|
|
setup_pci();
|
|
}
|
|
setup_idt();
|
|
fw_cfg_setup();
|
|
extract_acpi();
|
|
extract_e820();
|
|
setup_mptable();
|
|
extract_smbios();
|
|
boot_from_fwcfg();
|
|
panic();
|
|
}
|