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https://github.com/brain-hackers/u-boot-brain
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![Bin Meng](/assets/img/avatar_default.png)
Use inline assembly codes to call FspNotify() to make sure parameters are passed on the stack as required by the FSP calling convention. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
417 lines
10 KiB
C
417 lines
10 KiB
C
/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: Intel
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*/
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#include <common.h>
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#include <asm/arch/fsp/fsp_support.h>
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#include <asm/post.h>
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/**
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* Reads a 64-bit value from memory that may be unaligned.
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*
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* This function returns the 64-bit value pointed to by buf. The function
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* guarantees that the read operation does not produce an alignment fault.
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*
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* If the buf is NULL, then ASSERT().
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*
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* @buf: Pointer to a 64-bit value that may be unaligned.
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*
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* @return: The 64-bit value read from buf.
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*/
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static u64 read_unaligned64(const u64 *buf)
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{
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ASSERT(buf != NULL);
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return *buf;
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}
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/**
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* Compares two GUIDs
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*
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* If the GUIDs are identical then TRUE is returned.
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* If there are any bit differences in the two GUIDs, then FALSE is returned.
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*
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* If guid1 is NULL, then ASSERT().
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* If guid2 is NULL, then ASSERT().
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*
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* @guid1: A pointer to a 128 bit GUID.
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* @guid2: A pointer to a 128 bit GUID.
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*
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* @retval TRUE: guid1 and guid2 are identical.
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* @retval FALSE: guid1 and guid2 are not identical.
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*/
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static unsigned char compare_guid(const struct efi_guid_t *guid1,
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const struct efi_guid_t *guid2)
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{
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u64 guid1_low;
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u64 guid2_low;
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u64 guid1_high;
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u64 guid2_high;
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guid1_low = read_unaligned64((const u64 *)guid1);
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guid2_low = read_unaligned64((const u64 *)guid2);
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guid1_high = read_unaligned64((const u64 *)guid1 + 1);
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guid2_high = read_unaligned64((const u64 *)guid2 + 1);
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return (unsigned char)(guid1_low == guid2_low && guid1_high == guid2_high);
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}
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u32 __attribute__((optimize("O0"))) find_fsp_header(void)
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{
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volatile register u8 *fsp asm("eax");
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/* Initalize the FSP base */
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fsp = (u8 *)CONFIG_FSP_LOCATION;
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/* Check the FV signature, _FVH */
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if (((struct fv_header_t *)fsp)->sign == 0x4856465F) {
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/* Go to the end of the FV header and align the address */
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fsp += ((struct fv_header_t *)fsp)->ext_hdr_off;
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fsp += ((struct fv_ext_header_t *)fsp)->ext_hdr_size;
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fsp = (u8 *)(((u32)fsp + 7) & 0xFFFFFFF8);
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} else {
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fsp = 0;
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}
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/* Check the FFS GUID */
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if (fsp &&
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(((u32 *)&(((struct ffs_file_header_t *)fsp)->name))[0] == 0x912740BE) &&
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(((u32 *)&(((struct ffs_file_header_t *)fsp)->name))[1] == 0x47342284) &&
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(((u32 *)&(((struct ffs_file_header_t *)fsp)->name))[2] == 0xB08471B9) &&
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(((u32 *)&(((struct ffs_file_header_t *)fsp)->name))[3] == 0x0C3F3527)) {
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/* Add the FFS header size to find the raw section header */
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fsp += sizeof(struct ffs_file_header_t);
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} else {
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fsp = 0;
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}
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if (fsp &&
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((struct raw_section_t *)fsp)->type == EFI_SECTION_RAW) {
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/* Add the raw section header size to find the FSP header */
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fsp += sizeof(struct raw_section_t);
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} else {
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fsp = 0;
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}
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return (u32)fsp;
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}
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void fsp_continue(struct shared_data_t *shared_data, u32 status, void *hob_list)
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{
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u32 stack_len;
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u32 stack_base;
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u32 stack_top;
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post_code(POST_MRC);
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ASSERT(status == 0);
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/* Get the migrated stack in normal memory */
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stack_base = (u32)get_bootloader_tmp_mem(hob_list, &stack_len);
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ASSERT(stack_base != 0);
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stack_top = stack_base + stack_len - sizeof(u32);
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/*
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* Old stack base is stored at the very end of the stack top,
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* use it to calculate the migrated shared data base
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*/
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shared_data = (struct shared_data_t *)(stack_base +
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((u32)shared_data - *(u32 *)stack_top));
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/* The boot loader main function entry */
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fsp_init_done(hob_list);
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}
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void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf)
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{
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struct shared_data_t shared_data;
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fsp_init_f init;
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struct fsp_init_params_t params;
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struct fspinit_rtbuf_t rt_buf;
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struct vpd_region_t *fsp_vpd;
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struct fsp_header_t *fsp_hdr;
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struct fsp_init_params_t *params_ptr;
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struct upd_region_t *fsp_upd;
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fsp_hdr = (struct fsp_header_t *)find_fsp_header();
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if (fsp_hdr == NULL) {
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/* No valid FSP info header was found */
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ASSERT(FALSE);
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}
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fsp_upd = (struct upd_region_t *)&shared_data.fsp_upd;
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memset((void *)&rt_buf, 0, sizeof(struct fspinit_rtbuf_t));
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/* Reserve a gap in stack top */
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rt_buf.common.stack_top = (u32 *)stack_top - 32;
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rt_buf.common.boot_mode = boot_mode;
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rt_buf.common.upd_data = (struct upd_region_t *)fsp_upd;
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/* Get VPD region start */
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fsp_vpd = (struct vpd_region_t *)(fsp_hdr->img_base +
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fsp_hdr->cfg_region_off);
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/* Verifify the VPD data region is valid */
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ASSERT((fsp_vpd->img_rev == VPD_IMAGE_REV) &&
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(fsp_vpd->sign == VPD_IMAGE_ID));
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/* Copy default data from Flash */
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memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset),
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sizeof(struct upd_region_t));
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/* Verifify the UPD data region is valid */
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ASSERT(fsp_upd->terminator == 0x55AA);
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/* Override any UPD setting if required */
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update_fsp_upd(fsp_upd);
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memset((void *)¶ms, 0, sizeof(struct fsp_init_params_t));
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params.nvs_buf = nvs_buf;
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params.rt_buf = (struct fspinit_rtbuf_t *)&rt_buf;
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params.continuation = (fsp_continuation_f)asm_continuation;
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init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init);
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params_ptr = ¶ms;
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shared_data.fsp_hdr = fsp_hdr;
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shared_data.stack_top = (u32 *)stack_top;
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post_code(POST_PRE_MRC);
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/*
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* Use ASM code to ensure the register value in EAX & ECX
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* will be passed into BlContinuationFunc
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*/
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asm volatile (
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"pushl %0;"
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"call *%%eax;"
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".global asm_continuation;"
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"asm_continuation:;"
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"movl %%ebx, %%eax;" /* shared_data */
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"movl 4(%%esp), %%edx;" /* status */
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"movl 8(%%esp), %%ecx;" /* hob_list */
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"jmp fsp_continue;"
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: : "m"(params_ptr), "a"(init), "b"(&shared_data)
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);
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/*
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* Should never get here.
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* Control will continue from romstage_main_continue_asm.
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* This line below is to prevent the compiler from optimizing
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* structure intialization.
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*/
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init(¶ms);
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/*
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* Should never return.
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* Control will continue from ContinuationFunc
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*/
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ASSERT(FALSE);
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}
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u32 fsp_notify(struct fsp_header_t *fsp_hdr, u32 phase)
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{
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fsp_notify_f notify;
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struct fsp_notify_params_t params;
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struct fsp_notify_params_t *params_ptr;
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u32 status;
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if (!fsp_hdr)
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fsp_hdr = (struct fsp_header_t *)find_fsp_header();
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if (fsp_hdr == NULL) {
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/* No valid FSP info header */
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ASSERT(FALSE);
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}
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notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify);
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params.phase = phase;
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params_ptr = ¶ms;
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/*
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* Use ASM code to ensure correct parameter is on the stack for
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* FspNotify as U-Boot is using different ABI from FSP
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*/
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asm volatile (
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"pushl %1;" /* push notify phase */
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"call *%%eax;" /* call FspNotify */
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"addl $4, %%esp;" /* clean up the stack */
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: "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr)
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);
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return status;
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}
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u32 get_usable_lowmem_top(const void *hob_list)
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{
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union hob_pointers_t hob;
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phys_addr_t phys_start;
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u32 top;
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/* Get the HOB list for processing */
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hob.raw = (void *)hob_list;
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/* * Collect memory ranges */
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top = 0x100000;
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while (!END_OF_HOB(hob)) {
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if (hob.hdr->type == HOB_TYPE_RES_DESC) {
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if (hob.res_desc->type == RES_SYS_MEM) {
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phys_start = hob.res_desc->phys_start;
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/* Need memory above 1MB to be collected here */
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if (phys_start >= 0x100000 &&
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phys_start < (phys_addr_t)0x100000000)
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top += (u32)(hob.res_desc->len);
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}
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}
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hob.raw = GET_NEXT_HOB(hob);
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}
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return top;
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}
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u64 get_usable_highmem_top(const void *hob_list)
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{
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union hob_pointers_t hob;
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phys_addr_t phys_start;
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u64 top;
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/* Get the HOB list for processing */
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hob.raw = (void *)hob_list;
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/* Collect memory ranges */
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top = 0x100000000;
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while (!END_OF_HOB(hob)) {
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if (hob.hdr->type == HOB_TYPE_RES_DESC) {
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if (hob.res_desc->type == RES_SYS_MEM) {
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phys_start = hob.res_desc->phys_start;
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/* Need memory above 1MB to be collected here */
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if (phys_start >= (phys_addr_t)0x100000000)
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top += (u32)(hob.res_desc->len);
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}
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}
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hob.raw = GET_NEXT_HOB(hob);
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}
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return top;
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}
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u64 get_fsp_reserved_mem_from_guid(const void *hob_list, u64 *len,
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struct efi_guid_t *guid)
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{
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union hob_pointers_t hob;
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/* Get the HOB list for processing */
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hob.raw = (void *)hob_list;
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/* Collect memory ranges */
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while (!END_OF_HOB(hob)) {
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if (hob.hdr->type == HOB_TYPE_RES_DESC) {
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if (hob.res_desc->type == RES_MEM_RESERVED) {
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if (compare_guid(&hob.res_desc->owner, guid)) {
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if (len)
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*len = (u32)(hob.res_desc->len);
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return (u64)(hob.res_desc->phys_start);
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}
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}
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}
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hob.raw = GET_NEXT_HOB(hob);
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}
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return 0;
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}
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u32 get_fsp_reserved_mem(const void *hob_list, u32 *len)
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{
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const struct efi_guid_t guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID;
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u64 length;
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u32 base;
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base = (u32)get_fsp_reserved_mem_from_guid(hob_list,
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&length, (struct efi_guid_t *)&guid);
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if ((len != 0) && (base != 0))
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*len = (u32)length;
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return base;
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}
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u32 get_tseg_reserved_mem(const void *hob_list, u32 *len)
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{
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const struct efi_guid_t guid = FSP_HOB_RESOURCE_OWNER_TSEG_GUID;
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u64 length;
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u32 base;
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base = (u32)get_fsp_reserved_mem_from_guid(hob_list,
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&length, (struct efi_guid_t *)&guid);
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if ((len != 0) && (base != 0))
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*len = (u32)length;
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return base;
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}
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void *get_next_hob(u16 type, const void *hob_list)
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{
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union hob_pointers_t hob;
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ASSERT(hob_list != NULL);
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hob.raw = (u8 *)hob_list;
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/* Parse the HOB list until end of list or matching type is found */
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while (!END_OF_HOB(hob)) {
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if (hob.hdr->type == type)
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return hob.raw;
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hob.raw = GET_NEXT_HOB(hob);
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}
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return NULL;
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}
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void *get_next_guid_hob(const struct efi_guid_t *guid, const void *hob_list)
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{
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union hob_pointers_t hob;
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hob.raw = (u8 *)hob_list;
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while ((hob.raw = get_next_hob(HOB_TYPE_GUID_EXT,
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hob.raw)) != NULL) {
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if (compare_guid(guid, &hob.guid->name))
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break;
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hob.raw = GET_NEXT_HOB(hob);
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}
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return hob.raw;
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}
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void *get_guid_hob_data(const void *hob_list, u32 *len, struct efi_guid_t *guid)
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{
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u8 *guid_hob;
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guid_hob = get_next_guid_hob(guid, hob_list);
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if (guid_hob == NULL) {
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return NULL;
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} else {
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if (len)
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*len = GET_GUID_HOB_DATA_SIZE(guid_hob);
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return GET_GUID_HOB_DATA(guid_hob);
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}
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}
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void *get_fsp_nvs_data(const void *hob_list, u32 *len)
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{
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const struct efi_guid_t guid = FSP_NON_VOLATILE_STORAGE_HOB_GUID;
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return get_guid_hob_data(hob_list, len, (struct efi_guid_t *)&guid);
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}
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void *get_bootloader_tmp_mem(const void *hob_list, u32 *len)
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{
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const struct efi_guid_t guid = FSP_BOOTLOADER_TEMP_MEM_HOB_GUID;
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return get_guid_hob_data(hob_list, len, (struct efi_guid_t *)&guid);
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}
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