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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
#include <common.h>
#include <binman.h>
#include <binman_sym.h>
#include <bootstage.h>
#include <cbfs.h>
#include <dm.h>
#include <init.h>
#include <log.h>
#include <spi.h>
#include <spl.h>
#include <spi_flash.h>
#include <asm/intel_pinctrl.h>
#include <dm/uclass-internal.h>
#include <asm/fsp2/fsp_internal.h>
int arch_cpu_init_dm(void)
{
struct udevice *dev;
ofnode node;
int ret;
/* Make sure pads are set up early in U-Boot */
if (!ll_boot_init() || spl_phase() != PHASE_BOARD_F)
return 0;
/* Probe all pinctrl devices to set up the pads */
ret = uclass_first_device_err(UCLASS_PINCTRL, &dev);
if (ret)
return log_msg_ret("no fsp pinctrl", ret);
node = ofnode_path("fsp");
if (!ofnode_valid(node))
return log_msg_ret("no fsp params", -EINVAL);
ret = pinctrl_config_pads_for_node(dev, node);
if (ret)
return log_msg_ret("pad config", ret);
return ret;
}
#if !defined(CONFIG_TPL_BUILD)
binman_sym_declare(ulong, intel_fsp_m, image_pos);
binman_sym_declare(ulong, intel_fsp_m, size);
/**
* get_cbfs_fsp() - Obtain the FSP by looking up in CBFS
*
* This looks up an FSP in a CBFS. It is used mostly for testing, when booting
* U-Boot from a hybrid image containing coreboot as the first-stage bootloader.
*
* The typical use for this feature is when building a Chrome OS image which
* includes coreboot in it. By adding U-Boot into the 'COREBOOT' CBFS as well,
* it is possible to make coreboot chain-load U-Boot. Thus the initial stages of
* the SoC init can be done by coreboot and the later stages by U-Boot. This is
* a convenient way to start the porting work. The jump to U-Boot can then be
* moved progressively earlier and earlier, until U-Boot takes over all the init
* and you have a native port.
*
* This function looks up a CBFS at a known location and reads the FSP-M from it
* so that U-Boot can init the memory.
*
* This function is not used in the normal boot but is kept here for future
* development.
*
* @type; Type to look up (only FSP_M supported at present)
* @map_base: Base memory address for mapped SPI
* @entry: Returns an entry containing the position of the FSP image
*/
static int get_cbfs_fsp(enum fsp_type_t type, ulong map_base,
struct binman_entry *entry)
{
/*
* Use a hard-coded position of CBFS in the ROM for now. It would be
* possible to read the position using the FMAP in the ROM, but since
* this code is only used for development, it doesn't seem worth it.
* Use the 'cbfstool <image> layout' command to get these values, e.g.:
* 'COREBOOT' (CBFS, size 1814528, offset 2117632).
*/
ulong cbfs_base = 0x205000;
ulong cbfs_size = 0x1bb000;
struct cbfs_priv *cbfs;
int ret;
ret = cbfs_init_mem(map_base + cbfs_base, cbfs_size, &cbfs);
if (ret)
return ret;
if (!ret) {
const struct cbfs_cachenode *node;
node = cbfs_find_file(cbfs, "fspm.bin");
if (!node)
return log_msg_ret("fspm node", -ENOENT);
entry->image_pos = (ulong)node->data;
entry->size = node->data_length;
}
return 0;
}
int fsp_locate_fsp(enum fsp_type_t type, struct binman_entry *entry,
bool use_spi_flash, struct udevice **devp,
struct fsp_header **hdrp, ulong *rom_offsetp)
{
ulong mask = CONFIG_ROM_SIZE - 1;
struct udevice *dev;
ulong rom_offset = 0;
uint map_size;
ulong map_base;
uint offset;
int ret;
/*
* Find the devices but don't probe them, since we don't want to
* auto-config PCI before silicon init runs
*/
ret = uclass_find_first_device(UCLASS_NORTHBRIDGE, &dev);
if (ret)
return log_msg_ret("Cannot get northbridge", ret);
if (!use_spi_flash) {
struct udevice *sf;
/* Just use the SPI driver to get the memory map */
ret = uclass_find_first_device(UCLASS_SPI_FLASH, &sf);
if (ret)
return log_msg_ret("Cannot get SPI flash", ret);
ret = dm_spi_get_mmap(sf, &map_base, &map_size, &offset);
if (ret)
return log_msg_ret("Could not get flash mmap", ret);
}
if (spl_phase() >= PHASE_BOARD_F) {
if (type != FSP_S)
return -EPROTONOSUPPORT;
ret = binman_entry_find("intel-fsp-s", entry);
if (ret)
return log_msg_ret("binman entry", ret);
if (!use_spi_flash)
rom_offset = (map_base & mask) - CONFIG_ROM_SIZE;
} else {
ret = -ENOENT;
if (false)
/*
* Support using a hybrid image build by coreboot. See
* the function comments for details
*/
ret = get_cbfs_fsp(type, map_base, entry);
if (ret) {
ulong mask = CONFIG_ROM_SIZE - 1;
if (type != FSP_M)
return -EPROTONOSUPPORT;
entry->image_pos = binman_sym(ulong, intel_fsp_m,
image_pos);
entry->size = binman_sym(ulong, intel_fsp_m, size);
if (entry->image_pos != BINMAN_SYM_MISSING) {
ret = 0;
if (use_spi_flash)
entry->image_pos &= mask;
else
entry->image_pos += (map_base & mask);
} else {
ret = -ENOENT;
}
}
}
if (ret)
return log_msg_ret("Cannot find FSP", ret);
entry->image_pos += rom_offset;
/*
* Account for the time taken to read memory-mapped SPI flash since in
* this case we don't use the SPI driver and BOOTSTAGE_ID_ACCUM_SPI.
*/
if (!use_spi_flash)
bootstage_start(BOOTSTAGE_ID_ACCUM_MMAP_SPI, "mmap_spi");
ret = fsp_get_header(entry->image_pos, entry->size, use_spi_flash,
hdrp);
if (!use_spi_flash)
bootstage_accum(BOOTSTAGE_ID_ACCUM_MMAP_SPI);
if (ret)
return log_msg_ret("fsp_get_header", ret);
*devp = dev;
if (rom_offsetp)
*rom_offsetp = rom_offset;
return 0;
}
#endif
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