diff options
Diffstat (limited to 'qemu/roms/u-boot/arch/nios2/lib/bootm.c')
| -rw-r--r-- | qemu/roms/u-boot/arch/nios2/lib/bootm.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/arch/nios2/lib/bootm.c b/qemu/roms/u-boot/arch/nios2/lib/bootm.c new file mode 100644 index 000000000..c730a3fd0 --- /dev/null +++ b/qemu/roms/u-boot/arch/nios2/lib/bootm.c @@ -0,0 +1,61 @@ +/* + * (C) Copyright 2003, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <asm/byteorder.h> +#include <asm/cache.h> + +#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ + +int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) +{ + void (*kernel)(int, int, int, char *) = (void *)images->ep; + char *commandline = getenv("bootargs"); + ulong initrd_start = images->rd_start; + ulong initrd_end = images->rd_end; + char *of_flat_tree = NULL; +#if defined(CONFIG_OF_LIBFDT) + /* did generic code already find a device tree? */ + if (images->ft_len) + of_flat_tree = images->ft_addr; +#endif + if (!of_flat_tree && argc > 1) + of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); + if (of_flat_tree) + initrd_end = (ulong)of_flat_tree; + + /* + * allow the PREP bootm subcommand, it is required for bootm to work + */ + if (flag & BOOTM_STATE_OS_PREP) + return 0; + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + /* flushes data and instruction caches before calling the kernel */ + disable_interrupts(); + flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE); + flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE); + + debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); + debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); + /* kernel parameters passing + * r4 : NIOS magic + * r5 : initrd start + * r6 : initrd end or fdt + * r7 : kernel command line + * fdt is passed to kernel via r6, the same as initrd_end. fdt will be + * verified with fdt magic. when both initrd and fdt are used at the + * same time, fdt must follow immediately after initrd. + */ + kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); + /* does not return */ + + return 1; +} |