GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mb/emulation/qemu-i440fx: add e820 interface 

Qemu provides e820 table at fw_cfg interface. Add functions to access it.

Change-Id: I547bc7fef09999baa28149a6325cbca91e31e99b
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/30848
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Thomas Heijligen 2019-01-10 18:19:06 +01:00 committed by Nico Huber
parent 721c8b457b
commit da9aa6ddd7
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/mainboard/emulation/qemu-i440fx/fw_cfg.c
View File

@ -83,6 +83,45 @@ int fw_cfg_check_file(FWCfgFile *file, const char *name)
return fw_cfg_find_file(file, name);
}
static int fw_cfg_e820_select(uint32_t *size)
{
FWCfgFile file;
if (!fw_cfg_present() || fw_cfg_find_file(&file, "etc/e820"))
return -1;
fw_cfg_select(file.select);
*size = file.size;
return 0;
}
static int fw_cfg_e820_read(FwCfgE820Entry *entry, uint32_t *size,
uint32_t *pos)
{
if (*pos + sizeof(*entry) > *size)
return -1;
fw_cfg_read(entry, sizeof(*entry));
*pos += sizeof(*entry);
return 0;
}
/* returns tolud on success or 0 on failure */
uintptr_t fw_cfg_tolud(void)
{
FwCfgE820Entry e;
uint64_t top = 0;
uint32_t size = 0, pos = 0;
if (fw_cfg_e820_select(&size)) {
while (!fw_cfg_e820_read(&e, &size, &pos)) {
uint64_t limit = e.address + e.length;
if (e.type == 1 && limit < 4ULL * GiB && limit > top)
top = limit;
}
}
return (uintptr_t)top;
}
int fw_cfg_max_cpus(void)
{
unsigned short max_cpus;

1
src/mainboard/emulation/qemu-i440fx/fw_cfg.h
View File

@ -18,5 +18,6 @@ void fw_cfg_get(uint16_t entry, void *dst, int dstlen);
int fw_cfg_check_file(FWCfgFile *file, const char *name);
int fw_cfg_max_cpus(void);
unsigned long fw_cfg_smbios_tables(int *handle, unsigned long *current);
uintptr_t fw_cfg_tolud(void);
#endif /* FW_CFG_H */