mirror of
https://github.com/brain-hackers/u-boot-brain
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4afeedf172
The first argument of Linux kernel is the risc-v core hart id, from which the kernel is booted from. It is not the mach_id, which seems to be copied from arm. While we are here, this also changes the Linux kernel entry parameters' type to support both 32-bit and 64-bit. Note the hart id is hardcoded to zero for now, and we should change to fill in it with the value read from mhartid CSR of the hart which this routine is currently running on. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2011 Andes Technology Corporation
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* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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* Rick Chen, Andes Technology Corporation <rick@andestech.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <image.h>
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#include <u-boot/zlib.h>
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#include <asm/byteorder.h>
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DECLARE_GLOBAL_DATA_PTR;
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__weak void board_quiesce_devices(void)
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{
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}
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int arch_fixup_fdt(void *blob)
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{
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return 0;
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}
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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
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void (*kernel)(ulong hart, void *dtb);
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/*
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* allow the PREP bootm subcommand, it is required for bootm to work
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*/
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if (flag & BOOTM_STATE_OS_PREP)
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return 0;
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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kernel = (void (*)(ulong, void *))images->ep;
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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debug("## Transferring control to Linux (at address %08lx) ...\n",
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(ulong)kernel);
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if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
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#ifdef CONFIG_OF_LIBFDT
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debug("using: FDT\n");
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if (image_setup_linux(images)) {
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printf("FDT creation failed! hanging...");
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hang();
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}
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#endif
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}
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/* we assume that the kernel is in place */
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printf("\nStarting kernel ...\n\n");
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cleanup_before_linux();
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/* TODO: hardcode the hart id to zero for now */
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if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
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kernel(0, images->ft_addr);
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/* does not return */
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return 1;
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}
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