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author | Lukas Auer <lukas.auer@aisec.fraunhofer.de> | 2018-11-22 11:26:32 +0100 |
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committer | Andes <uboot@andestech.com> | 2018-11-26 13:57:32 +0800 |
commit | c3b1a99040278ebcfab63c9a971e14d66d192825 (patch) | |
tree | c34b26f54b3a6118306f4b44846385842acb9987 /arch/riscv/lib/bootm.c | |
parent | 52b984369fde8296c735575848075462e9112b69 (diff) | |
download | u-boot-c3b1a99040278ebcfab63c9a971e14d66d192825.zip u-boot-c3b1a99040278ebcfab63c9a971e14d66d192825.tar.gz u-boot-c3b1a99040278ebcfab63c9a971e14d66d192825.tar.bz2 |
riscv: align bootm implementation with that of other architectures
The bootm implementation of RISC-V diverges from that of other
architectures. Update it to match the implementation of other
architectures. The ARM implementation is used as a reference.
This adds the following features and changes to RISC-V.
* Add support for the BOOTM_STATE_OS_FAKE_GO command
* Call the remove function on devices with the removal flag set before
booting Linux
* Force disconnect USB devices from the host before booting Linux
* Print and add bootstage information to the device tree before booting
Linux
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/riscv/lib/bootm.c')
-rw-r--r-- | arch/riscv/lib/bootm.c | 97 |
1 files changed, 70 insertions, 27 deletions
diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c index 2b5ccce..124aeef 100644 --- a/arch/riscv/lib/bootm.c +++ b/arch/riscv/lib/bootm.c @@ -8,6 +8,8 @@ #include <common.h> #include <command.h> +#include <dm.h> +#include <dm/root.h> #include <image.h> #include <asm/byteorder.h> #include <asm/csr.h> @@ -26,26 +28,41 @@ int arch_fixup_fdt(void *blob) return 0; } -int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +/** + * announce_and_cleanup() - Print message and prepare for kernel boot + * + * @fake: non-zero to do everything except actually boot + */ +static void announce_and_cleanup(int fake) { - void (*kernel)(ulong hart, void *dtb); - - /* - * allow the PREP bootm subcommand, it is required for bootm to work - */ - if (flag & BOOTM_STATE_OS_PREP) - return 0; + printf("\nStarting kernel ...%s\n\n", fake ? + "(fake run for tracing)" : ""); + bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); +#ifdef CONFIG_BOOTSTAGE_FDT + bootstage_fdt_add_report(); +#endif +#ifdef CONFIG_BOOTSTAGE_REPORT + bootstage_report(); +#endif - if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) - return 1; +#ifdef CONFIG_USB_DEVICE + udc_disconnect(); +#endif - kernel = (void (*)(ulong, void *))images->ep; + board_quiesce_devices(); - bootstage_mark(BOOTSTAGE_ID_RUN_OS); + /* + * Call remove function of all devices with a removal flag set. + * This may be useful for last-stage operations, like cancelling + * of DMA operation or releasing device internal buffers. + */ + dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); - debug("## Transferring control to Linux (at address %08lx) ...\n", - (ulong)kernel); + cleanup_before_linux(); +} +static void boot_prep_linux(bootm_headers_t *images) +{ if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { #ifdef CONFIG_OF_LIBFDT debug("using: FDT\n"); @@ -54,24 +71,50 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) hang(); } #endif + } else { + printf("Device tree not found or missing FDT support\n"); + hang(); } +} - /* we assume that the kernel is in place */ - printf("\nStarting kernel ...\n\n"); +static void boot_jump_linux(bootm_headers_t *images, int flag) +{ + void (*kernel)(ulong hart, void *dtb); + int fake = (flag & BOOTM_STATE_OS_FAKE_GO); - /* - * Call remove function of all devices with a removal flag set. - * This may be useful for last-stage operations, like cancelling - * of DMA operation or releasing device internal buffers. - */ - dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); + kernel = (void (*)(ulong, void *))images->ep; - cleanup_before_linux(); + bootstage_mark(BOOTSTAGE_ID_RUN_OS); + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong)kernel); - if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) - kernel(csr_read(mhartid), images->ft_addr); + announce_and_cleanup(fake); - /* does not return */ + if (!fake) { + if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) + kernel(csr_read(mhartid), images->ft_addr); + } +} + +int do_bootm_linux(int flag, int argc, char * const argv[], + bootm_headers_t *images) +{ + /* No need for those on RISC-V */ + if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) + return -1; - return 1; + if (flag & BOOTM_STATE_OS_PREP) { + boot_prep_linux(images); + return 0; + } + + if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { + boot_jump_linux(images, flag); + return 0; + } + + boot_prep_linux(images); + boot_jump_linux(images, flag); + return 0; } |