mirror of
https://github.com/brain-hackers/u-boot-brain
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133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
// SPDX-License-Identifier: Intel
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/*
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* Copyright 2019 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <spi_flash.h>
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#include <asm/fsp/fsp_support.h>
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#include <asm/fsp2/fsp_internal.h>
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/* The amount of the FSP header to probe to obtain what we need */
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#define PROBE_BUF_SIZE 0x180
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int fsp_get_header(ulong offset, ulong size, bool use_spi_flash,
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struct fsp_header **fspp)
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{
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static efi_guid_t guid = FSP_HEADER_GUID;
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struct fv_ext_header *exhdr;
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struct fsp_header *fsp;
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struct ffs_file_header *file_hdr;
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struct fv_header *fv;
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struct raw_section *raw;
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void *ptr, *base;
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u8 buf[PROBE_BUF_SIZE];
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struct udevice *dev;
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int ret;
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/*
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* There are quite a very steps to work through all the headers in this
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* file and the structs have similar names. Turn on debugging if needed
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* to understand what is going wrong.
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*
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* You are in a maze of twisty little headers all alike.
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*/
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debug("offset=%x buf=%x\n", (uint)offset, (uint)buf);
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if (use_spi_flash) {
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ret = uclass_first_device_err(UCLASS_SPI_FLASH, &dev);
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if (ret)
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return log_msg_ret("Cannot find flash device", ret);
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ret = spi_flash_read_dm(dev, offset, PROBE_BUF_SIZE, buf);
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if (ret)
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return log_msg_ret("Cannot read flash", ret);
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} else {
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memcpy(buf, (void *)offset, PROBE_BUF_SIZE);
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}
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/* Initalise the FSP base */
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ptr = buf;
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fv = ptr;
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/* Check the FV signature, _FVH */
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debug("offset=%x sign=%x\n", (uint)offset, (uint)fv->sign);
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if (fv->sign != EFI_FVH_SIGNATURE)
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return log_msg_ret("Base FV signature", -EINVAL);
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/* Go to the end of the FV header and align the address */
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debug("fv->ext_hdr_off = %x\n", fv->ext_hdr_off);
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ptr += fv->ext_hdr_off;
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exhdr = ptr;
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ptr += ALIGN(exhdr->ext_hdr_size, 8);
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debug("ptr=%x\n", ptr - (void *)buf);
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/* Check the FFS GUID */
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file_hdr = ptr;
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if (memcmp(&file_hdr->name, &guid, sizeof(guid)))
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return log_msg_ret("Base FFS GUID", -ENXIO);
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/* Add the FFS header size to find the raw section header */
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ptr = file_hdr + 1;
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raw = ptr;
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debug("raw->type = %x\n", raw->type);
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if (raw->type != EFI_SECTION_RAW)
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return log_msg_ret("Section type not RAW", -ENOEXEC);
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/* Add the raw section header size to find the FSP header */
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ptr = raw + 1;
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fsp = ptr;
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/* Check the FSPH header */
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debug("fsp %x\n", (uint)fsp);
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if (fsp->sign != EFI_FSPH_SIGNATURE)
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return log_msg_ret("Base FSPH signature", -EACCES);
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base = (void *)fsp->img_base;
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debug("Image base %x\n", (uint)base);
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debug("Image addr %x\n", (uint)fsp->fsp_mem_init);
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if (use_spi_flash) {
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ret = spi_flash_read_dm(dev, offset, size, base);
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if (ret)
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return log_msg_ret("Could not read FPS-M", ret);
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} else {
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memcpy(base, (void *)offset, size);
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}
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ptr = base + (ptr - (void *)buf);
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*fspp = ptr;
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return 0;
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}
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u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase)
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{
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fsp_notify_f notify;
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struct fsp_notify_params params;
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struct fsp_notify_params *params_ptr;
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u32 status;
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if (!fsp_hdr)
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fsp_hdr = gd->arch.fsp_s_hdr;
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if (!fsp_hdr)
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return log_msg_ret("no FSP", -ENOENT);
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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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