SPL needs to set up the machine ready for loading 64-bit U-Boot and jumping to it. Call the existing init routines in order to accomplish this.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: None
arch/x86/include/asm/spl.h | 8 +++ arch/x86/lib/Makefile | 1 + arch/x86/lib/spl.c | 149 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 158 insertions(+) create mode 100644 arch/x86/include/asm/spl.h create mode 100644 arch/x86/lib/spl.c
diff --git a/arch/x86/include/asm/spl.h b/arch/x86/include/asm/spl.h new file mode 100644 index 0000000..a8bce98 --- /dev/null +++ b/arch/x86/include/asm/spl.h @@ -0,0 +1,8 @@ +/* + * Copyright (C) 2014 Google, Inc + * Written by Simon Glass sjg@chromium.org + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This file is required for SPL to build, but is empty. + */ diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index ff402dc..db538ad 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -37,6 +37,7 @@ endif obj-y += tables.o obj-$(CONFIG_CMD_ZBOOT) += zimage.o obj-$(CONFIG_HAVE_FSP) += fsp/ +obj-$(CONFIG_SPL_BUILD) += spl.o
extra-$(CONFIG_USE_PRIVATE_LIBGCC) += lib.a
diff --git a/arch/x86/lib/spl.c b/arch/x86/lib/spl.c new file mode 100644 index 0000000..61d085f --- /dev/null +++ b/arch/x86/lib/spl.c @@ -0,0 +1,149 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <debug_uart.h> +#include <spl.h> +#include <asm/cpu.h> +#include <asm/init_helpers.h> +#include <asm/mtrr.h> +#include <asm/processor.h> +#include <asm-generic/sections.h> + +DECLARE_GLOBAL_DATA_PTR; + +static int x86_spl_init(void) +{ + /* + * TODO(sjg@chromium.org): We use this area of RAM for the stack + * and global_data in SPL. Once U-Boot starts up and releocates it + * is not needed. We could make this a CONFIG option or perhaps + * place it immediately below CONFIG_SYS_TEXT_BASE. + */ + char *ptr = (char *)0x110000; + int ret; + + debug("%s starting\n", __func__); + ret = spl_init(); + if (ret) { + debug("%s: spl_init() failed\n", __func__); + return ret; + } + preloader_console_init(); + + ret = arch_cpu_init(); + if (ret) { + debug("%s: arch_cpu_init() failed\n", __func__); + return ret; + } + ret = arch_cpu_init_dm(); + if (ret) { + debug("%s: arch_cpu_init_dm() failed\n", __func__); + return ret; + } + ret = print_cpuinfo(); + if (ret) { + debug("%s: print_cpuinfo() failed\n", __func__); + return ret; + } + ret = dram_init(); + if (ret) { + debug("%s: dram_init() failed\n", __func__); + return ret; + } + memset(&__bss_start, 0, (ulong)&__bss_end - (ulong)&__bss_start); + + /* TODO(sjg@chromium.org): Consider calling cpu_init_r() here */ + ret = interrupt_init(); + if (ret) { + debug("%s: interrupt_init() failed\n", __func__); + return ret; + } + + gd->new_gd = (struct global_data *)ptr + 0x100; + memcpy(gd->new_gd, gd, sizeof(*gd)); + arch_setup_gd(gd->new_gd); + gd->start_addr_sp = (ulong)ptr; + + /* Cache the SPI flash. Otherwise copying the code to RAM takes ages */ + ret = mtrr_add_request(MTRR_TYPE_WRBACK, + (1ULL << 32) - CONFIG_XIP_ROM_SIZE, + CONFIG_XIP_ROM_SIZE); + if (ret) { + debug("%s: SPI cache setup failed\n", __func__); + return ret; + } + + return 0; +} + +void board_init_f(ulong flags) +{ + int ret; + + ret = x86_spl_init(); + if (ret) { + debug("Error %d\n", ret); + hang(); + } + + /* Uninit CAR and jump to board_init_f_r() */ + board_init_f_r_trampoline(gd->start_addr_sp); +} + +void board_init_f_r(void) +{ + init_cache_f_r(); + gd->flags &= ~GD_FLG_SERIAL_READY; + debug("cache status %d\n", dcache_status()); + board_init_r(gd, 0); +} + +u32 spl_boot_device(void) +{ + return BOOT_DEVICE_BOARD; +} + +int spl_start_uboot(void) +{ + return 0; +} + +void spl_board_announce_boot_device(void) +{ + printf("SPI flash"); +} + +static int spl_board_load_image(struct spl_image_info *spl_image, + struct spl_boot_device *bootdev) +{ + spl_image->size = CONFIG_SYS_MONITOR_LEN; + spl_image->entry_point = CONFIG_SYS_TEXT_BASE; + spl_image->load_addr = CONFIG_SYS_TEXT_BASE; + spl_image->os = IH_OS_U_BOOT; + spl_image->name = "U-Boot"; + + debug("Loading to %x\n", spl_image->load_addr); + + return 0; +} +SPL_LOAD_IMAGE_METHOD(0, BOOT_DEVICE_BOARD, spl_board_load_image); + +int spl_spi_load_image(void) +{ + return -EPERM; +} + +void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) +{ + int ret; + + printf("Jumping to 64-bit U-Boot: Note many features are missing\n"); + ret = cpu_jump_to_64bit_uboot(spl_image->entry_point); + debug("ret=%d\n", ret); + while (1); +}