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x86: apl: Add SPL loaders

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Add loaders for SPL and TPL so that the next stage can be loaded from
memory-mapped SPI or, failing that, the Fast SPI driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-12-08 17:40:13 -07:00 • committed by Bin Meng
parent e82c624d7c
commit 409d4c6fe9
2 changed files with 180 additions and 0 deletions
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2
arch/x86/cpu/apollolake/Makefile
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@ -2,7 +2,9 @@
#
# Copyright 2019 Google LLC
obj-$(CONFIG_SPL_BUILD) += spl.o
obj-$(CONFIG_SPL_BUILD) += systemagent.o
ifndef CONFIG_TPL_BUILD
obj-y += punit.o
endif

178
arch/x86/cpu/apollolake/spl.c Normal file
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@ -0,0 +1,178 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
#include <common.h>
#include <binman_sym.h>
#include <dm.h>
#include <spi.h>
#include <spl.h>
#include <spi_flash.h>
#include <asm/fast_spi.h>
#include <asm/spl.h>
#include <asm/arch/cpu.h>
#include <asm/arch/iomap.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
/* This reads the next phase from mapped SPI flash */
static int rom_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
ulong spl_pos = spl_get_image_pos();
ulong spl_size = spl_get_image_size();
struct udevice *dev;
ulong map_base;
size_t map_size;
uint offset;
int ret;
spl_image->size = CONFIG_SYS_MONITOR_LEN; /* We don't know SPL size */
spl_image->entry_point = spl_phase() == PHASE_TPL ?
CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE;
spl_image->load_addr = spl_image->entry_point;
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";
debug("Reading from mapped SPI %lx, size %lx", spl_pos, spl_size);
if (CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)) {
ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev);
if (ret)
return log_msg_ret("spi_flash", ret);
if (!dev)
return log_msg_ret("spi_flash dev", -ENODEV);
ret = dm_spi_get_mmap(dev, &map_base, &map_size, &offset);
if (ret)
return log_msg_ret("mmap", ret);
} else {
ret = fast_spi_get_bios_mmap(PCH_DEV_SPI, &map_base, &map_size,
&offset);
if (ret)
return ret;
}
spl_pos += map_base & ~0xff000000;
debug(", base %lx, pos %lx\n", map_base, spl_pos);
bootstage_start(BOOTSTAGE_ID_ACCUM_MMAP_SPI, "mmap_spi");
memcpy((void *)spl_image->load_addr, (void *)spl_pos, spl_size);
cpu_flush_l1d_to_l2();
bootstage_accum(BOOTSTAGE_ID_ACCUM_MMAP_SPI);
return 0;
}
SPL_LOAD_IMAGE_METHOD("Mapped SPI", 2, BOOT_DEVICE_SPI_MMAP, rom_load_image);
#if CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)
static int apl_flash_std_read(struct udevice *dev, u32 offset, size_t len,
void *buf)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
struct mtd_info *mtd = &flash->mtd;
size_t retlen;
return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));
}
static int apl_flash_probe(struct udevice *dev)
{
return spi_flash_std_probe(dev);
}
/*
* Manually set the parent of the SPI flash to SPI, since dtoc doesn't. We also
* need to allocate the parent_platdata since by the time this function is
* called device_bind() has already gone past that step.
*/
static int apl_flash_bind(struct udevice *dev)
{
if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
struct dm_spi_slave_platdata *plat;
struct udevice *spi;
int ret;
ret = uclass_first_device_err(UCLASS_SPI, &spi);
if (ret)
return ret;
dev->parent = spi;
plat = calloc(sizeof(*plat), 1);
if (!plat)
return -ENOMEM;
dev->parent_platdata = plat;
}
return 0;
}
static const struct dm_spi_flash_ops apl_flash_ops = {
.read = apl_flash_std_read,
};
static const struct udevice_id apl_flash_ids[] = {
{ .compatible = "jedec,spi-nor" },
{ }
};
U_BOOT_DRIVER(winbond_w25q128fw) = {
.name = "winbond_w25q128fw",
.id = UCLASS_SPI_FLASH,
.of_match = apl_flash_ids,
.bind = apl_flash_bind,
.probe = apl_flash_probe,
.priv_auto_alloc_size = sizeof(struct spi_flash),
.ops = &apl_flash_ops,
};
/* This uses a SPI flash device to read the next phase */
static int spl_fast_spi_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
ulong spl_pos = spl_get_image_pos();
ulong spl_size = spl_get_image_size();
struct udevice *dev;
int ret;
ret = uclass_first_device_err(UCLASS_SPI_FLASH, &dev);
if (ret)
return ret;
spl_image->size = CONFIG_SYS_MONITOR_LEN; /* We don't know SPL size */
spl_image->entry_point = spl_phase() == PHASE_TPL ?
CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE;
spl_image->load_addr = spl_image->entry_point;
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";
spl_pos &= ~0xff000000;
debug("Reading from flash %lx, size %lx\n", spl_pos, spl_size);
ret = spi_flash_read_dm(dev, spl_pos, spl_size,
(void *)spl_image->load_addr);
cpu_flush_l1d_to_l2();
if (ret)
return ret;
return 0;
}
SPL_LOAD_IMAGE_METHOD("Fast SPI", 1, BOOT_DEVICE_FAST_SPI,
spl_fast_spi_load_image);
void board_boot_order(u32 *spl_boot_list)
{
bool use_spi_flash = IS_ENABLED(CONFIG_APL_BOOT_FROM_FAST_SPI_FLASH);
if (use_spi_flash) {
spl_boot_list[0] = BOOT_DEVICE_FAST_SPI;
spl_boot_list[1] = BOOT_DEVICE_SPI_MMAP;
} else {
spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP;
spl_boot_list[1] = BOOT_DEVICE_FAST_SPI;
}
}
#else
void board_boot_order(u32 *spl_boot_list)
{
spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP;
}
#endif