u-boot/arch/x86/lib/fsp/fsp_support.c

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// SPDX-License-Identifier: Intel
/*
* Copyright (C) 2013, Intel Corporation
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <asm/fsp/fsp_support.h>
#include <asm/post.h>
/**
* Compares two GUIDs
*
* If the GUIDs are identical then true is returned.
* If there are any bit differences in the two GUIDs, then false is returned.
*
* @guid1: A pointer to a 128 bit GUID.
* @guid2: A pointer to a 128 bit GUID.
*
* @retval true: guid1 and guid2 are identical.
* @retval false: guid1 and guid2 are not identical.
*/
static bool compare_guid(const struct efi_guid *guid1,
const struct efi_guid *guid2)
{
if (memcmp(guid1, guid2, sizeof(struct efi_guid)) == 0)
return true;
else
return false;
}
struct fsp_header *__attribute__((optimize("O0"))) find_fsp_header(void)
{
/*
* This function may be called before the a stack is established,
* so special care must be taken. First, it cannot declare any local
* variable using stack. Only register variable can be used here.
* Secondly, some compiler version will add prolog or epilog code
* for the C function. If so the function call may not work before
* stack is ready.
*
* GCC 4.8.1 has been verified to be working for the following codes.
*/
volatile register u8 *fsp asm("eax");
/* Initalize the FSP base */
fsp = (u8 *)CONFIG_FSP_ADDR;
/* Check the FV signature, _FVH */
if (((struct fv_header *)fsp)->sign == EFI_FVH_SIGNATURE) {
/* Go to the end of the FV header and align the address */
fsp += ((struct fv_header *)fsp)->ext_hdr_off;
fsp += ((struct fv_ext_header *)fsp)->ext_hdr_size;
fsp = (u8 *)(((u32)fsp + 7) & 0xFFFFFFF8);
} else {
fsp = 0;
}
/* Check the FFS GUID */
if (fsp &&
((struct ffs_file_header *)fsp)->name.data1 == FSP_GUID_DATA1 &&
((struct ffs_file_header *)fsp)->name.data2 == FSP_GUID_DATA2 &&
((struct ffs_file_header *)fsp)->name.data3 == FSP_GUID_DATA3 &&
((struct ffs_file_header *)fsp)->name.data4[0] == FSP_GUID_DATA4_0 &&
((struct ffs_file_header *)fsp)->name.data4[1] == FSP_GUID_DATA4_1 &&
((struct ffs_file_header *)fsp)->name.data4[2] == FSP_GUID_DATA4_2 &&
((struct ffs_file_header *)fsp)->name.data4[3] == FSP_GUID_DATA4_3 &&
((struct ffs_file_header *)fsp)->name.data4[4] == FSP_GUID_DATA4_4 &&
((struct ffs_file_header *)fsp)->name.data4[5] == FSP_GUID_DATA4_5 &&
((struct ffs_file_header *)fsp)->name.data4[6] == FSP_GUID_DATA4_6 &&
((struct ffs_file_header *)fsp)->name.data4[7] == FSP_GUID_DATA4_7) {
/* Add the FFS header size to find the raw section header */
fsp += sizeof(struct ffs_file_header);
} else {
fsp = 0;
}
if (fsp &&
((struct raw_section *)fsp)->type == EFI_SECTION_RAW) {
/* Add the raw section header size to find the FSP header */
fsp += sizeof(struct raw_section);
} else {
fsp = 0;
}
return (struct fsp_header *)fsp;
}
void fsp_continue(u32 status, void *hob_list)
{
post_code(POST_MRC);
assert(status == 0);
/* The boot loader main function entry */
fsp_init_done(hob_list);
}
void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf)
{
struct fsp_config_data config_data;
fsp_init_f init;
struct fsp_init_params params;
struct fspinit_rtbuf rt_buf;
struct fsp_header *fsp_hdr;
struct fsp_init_params *params_ptr;
#ifdef CONFIG_FSP_USE_UPD
struct vpd_region *fsp_vpd;
struct upd_region *fsp_upd;
#endif
fsp_hdr = find_fsp_header();
if (fsp_hdr == NULL) {
/* No valid FSP info header was found */
panic("Invalid FSP header");
}
config_data.common.fsp_hdr = fsp_hdr;
config_data.common.stack_top = stack_top;
config_data.common.boot_mode = boot_mode;
#ifdef CONFIG_FSP_USE_UPD
/* Get VPD region start */
fsp_vpd = (struct vpd_region *)(fsp_hdr->img_base +
fsp_hdr->cfg_region_off);
/* Verify the VPD data region is valid */
assert(fsp_vpd->sign == VPD_IMAGE_ID);
fsp_upd = &config_data.fsp_upd;
/* Copy default data from Flash */
memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset),
sizeof(struct upd_region));
/* Verify the UPD data region is valid */
assert(fsp_upd->terminator == UPD_TERMINATOR);
#endif
memset(&rt_buf, 0, sizeof(struct fspinit_rtbuf));
/* Override any configuration if required */
update_fsp_configs(&config_data, &rt_buf);
memset(&params, 0, sizeof(struct fsp_init_params));
params.nvs_buf = nvs_buf;
params.rt_buf = (struct fspinit_rtbuf *)&rt_buf;
params.continuation = (fsp_continuation_f)asm_continuation;
init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init);
params_ptr = &params;
post_code(POST_PRE_MRC);
/* Load GDT for FSP */
setup_fsp_gdt();
/*
* Use ASM code to ensure the register value in EAX & EDX
* will be passed into fsp_continue
*/
asm volatile (
"pushl %0;"
"call *%%eax;"
".global asm_continuation;"
"asm_continuation:;"
"movl 4(%%esp), %%eax;" /* status */
"movl 8(%%esp), %%edx;" /* hob_list */
"jmp fsp_continue;"
: : "m"(params_ptr), "a"(init)
);
/*
* Should never get here.
* Control will continue from fsp_continue.
* This line below is to prevent the compiler from optimizing
* structure intialization.
*
* DO NOT REMOVE!
*/
init(&params);
}
u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase)
{
fsp_notify_f notify;
struct fsp_notify_params params;
struct fsp_notify_params *params_ptr;
u32 status;
if (!fsp_hdr)
fsp_hdr = (struct fsp_header *)find_fsp_header();
if (fsp_hdr == NULL) {
/* No valid FSP info header */
panic("Invalid FSP header");
}
notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify);
params.phase = phase;
params_ptr = &params;
/*
* Use ASM code to ensure correct parameter is on the stack for
* FspNotify as U-Boot is using different ABI from FSP
*/
asm volatile (
"pushl %1;" /* push notify phase */
"call *%%eax;" /* call FspNotify */
"addl $4, %%esp;" /* clean up the stack */
: "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr)
);
return status;
}
u32 fsp_get_usable_lowmem_top(const void *hob_list)
{
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
phys_addr_t phys_start;
u32 top;
#ifdef CONFIG_FSP_BROKEN_HOB
struct hob_mem_alloc *res_mem;
phys_addr_t mem_base = 0;
#endif
/* Get the HOB list for processing */
hdr = hob_list;
/* * Collect memory ranges */
top = FSP_LOWMEM_BASE;
while (!end_of_hob(hdr)) {
if (hdr->type == HOB_TYPE_RES_DESC) {
res_desc = (struct hob_res_desc *)hdr;
if (res_desc->type == RES_SYS_MEM) {
phys_start = res_desc->phys_start;
/* Need memory above 1MB to be collected here */
if (phys_start >= FSP_LOWMEM_BASE &&
phys_start < (phys_addr_t)FSP_HIGHMEM_BASE)
top += (u32)(res_desc->len);
}
}
#ifdef CONFIG_FSP_BROKEN_HOB
/*
* Find out the lowest memory base address allocated by FSP
* for the boot service data
*/
if (hdr->type == HOB_TYPE_MEM_ALLOC) {
res_mem = (struct hob_mem_alloc *)hdr;
if (!mem_base)
mem_base = res_mem->mem_base;
if (res_mem->mem_base < mem_base)
mem_base = res_mem->mem_base;
}
#endif
hdr = get_next_hob(hdr);
}
#ifdef CONFIG_FSP_BROKEN_HOB
/*
* Check whether the memory top address is below the FSP HOB list.
* If not, use the lowest memory base address allocated by FSP as
* the memory top address. This is to prevent U-Boot relocation
* overwrites the important boot service data which is used by FSP,
* otherwise the subsequent call to fsp_notify() will fail.
*/
if (top > (u32)hob_list) {
debug("Adjust memory top address due to a buggy FSP\n");
top = (u32)mem_base;
}
#endif
return top;
}
u64 fsp_get_usable_highmem_top(const void *hob_list)
{
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
phys_addr_t phys_start;
u64 top;
/* Get the HOB list for processing */
hdr = hob_list;
/* Collect memory ranges */
top = FSP_HIGHMEM_BASE;
while (!end_of_hob(hdr)) {
if (hdr->type == HOB_TYPE_RES_DESC) {
res_desc = (struct hob_res_desc *)hdr;
if (res_desc->type == RES_SYS_MEM) {
phys_start = res_desc->phys_start;
/* Need memory above 4GB to be collected here */
if (phys_start >= (phys_addr_t)FSP_HIGHMEM_BASE)
top += (u32)(res_desc->len);
}
}
hdr = get_next_hob(hdr);
}
return top;
}
u64 fsp_get_reserved_mem_from_guid(const void *hob_list, u64 *len,
struct efi_guid *guid)
{
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
/* Get the HOB list for processing */
hdr = hob_list;
/* Collect memory ranges */
while (!end_of_hob(hdr)) {
if (hdr->type == HOB_TYPE_RES_DESC) {
res_desc = (struct hob_res_desc *)hdr;
if (res_desc->type == RES_MEM_RESERVED) {
if (compare_guid(&res_desc->owner, guid)) {
if (len)
*len = (u32)(res_desc->len);
return (u64)(res_desc->phys_start);
}
}
}
hdr = get_next_hob(hdr);
}
return 0;
}
u32 fsp_get_fsp_reserved_mem(const void *hob_list, u32 *len)
{
const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID;
u64 length;
u32 base;
base = (u32)fsp_get_reserved_mem_from_guid(hob_list,
&length, (struct efi_guid *)&guid);
if ((len != 0) && (base != 0))
*len = (u32)length;
return base;
}
u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len)
{
const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_TSEG_GUID;
u64 length;
u32 base;
base = (u32)fsp_get_reserved_mem_from_guid(hob_list,
&length, (struct efi_guid *)&guid);
if ((len != 0) && (base != 0))
*len = (u32)length;
return base;
}
const struct hob_header *fsp_get_next_hob(uint type, const void *hob_list)
{
const struct hob_header *hdr;
hdr = hob_list;
/* Parse the HOB list until end of list or matching type is found */
while (!end_of_hob(hdr)) {
if (hdr->type == type)
return hdr;
hdr = get_next_hob(hdr);
}
return NULL;
}
const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid,
const void *hob_list)
{
const struct hob_header *hdr;
struct hob_guid *guid_hob;
hdr = hob_list;
while ((hdr = fsp_get_next_hob(HOB_TYPE_GUID_EXT,
hdr)) != NULL) {
guid_hob = (struct hob_guid *)hdr;
if (compare_guid(guid, &(guid_hob->name)))
break;
hdr = get_next_hob(hdr);
}
return hdr;
}
void *fsp_get_guid_hob_data(const void *hob_list, u32 *len,
struct efi_guid *guid)
{
const struct hob_header *guid_hob;
guid_hob = fsp_get_next_guid_hob(guid, hob_list);
if (guid_hob == NULL) {
return NULL;
} else {
if (len)
*len = get_guid_hob_data_size(guid_hob);
return get_guid_hob_data(guid_hob);
}
}
void *fsp_get_nvs_data(const void *hob_list, u32 *len)
{
const struct efi_guid guid = FSP_NON_VOLATILE_STORAGE_HOB_GUID;
return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid);
}
void *fsp_get_bootloader_tmp_mem(const void *hob_list, u32 *len)
{
const struct efi_guid guid = FSP_BOOTLOADER_TEMP_MEM_HOB_GUID;
return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid);
}
void *fsp_get_graphics_info(const void *hob_list, u32 *len)
{
const struct efi_guid guid = FSP_GRAPHICS_INFO_HOB_GUID;
return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid);
}