1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
7 * (c) Copyright 2008 Renesas Solutions Corp.
14 #include <asm/byteorder.h>
15 #include <asm/global_data.h>
16 #include <asm/zimage.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 #ifdef CONFIG_SH_SDRAM_OFFSET
21 #define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
23 #define GET_INITRD_START(initrd, linux) (initrd - linux)
26 static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
28 *(unsigned long *)(param_addr) = data;
31 static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
33 unsigned long val = 0;
34 char *p = strstr(cmdline, key);
37 val = simple_strtol(p, NULL, base);
42 int do_bootm_linux(int flag, int argc, char *const argv[],
43 struct bootm_headers *images)
45 /* Linux kernel load address */
46 void (*kernel) (void) = (void (*)(void))images->ep;
49 = (unsigned char *)image_get_load(images->legacy_hdr_os);
50 /* Linux kernel command line */
51 char *cmdline = (char *)param + COMMAND_LINE;
53 unsigned long size = images->ep - (unsigned long)param;
54 char *bootargs = env_get("bootargs");
57 * allow the PREP bootm subcommand, it is required for bootm to work
59 if (flag & BOOTM_STATE_OS_PREP)
62 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
66 memset(param, 0, size);
69 strcpy(cmdline, bootargs);
72 if (images->rd_start || images->rd_end) {
73 unsigned long ramdisk_flags = 0;
74 int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
76 ramdisk_flags |= RD_PROMPT;
78 ramdisk_flags &= ~RD_PROMPT;
80 val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
82 ramdisk_flags |= RD_DOLOAD;
84 ramdisk_flags &= ~RD_DOLOAD;
86 set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
87 set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
88 set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
89 set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
90 set_sh_linux_param((unsigned long)param + INITRD_START,
91 GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
92 set_sh_linux_param((unsigned long)param + INITRD_SIZE,
93 images->rd_end - images->rd_start);
103 static ulong get_sp(void)
107 asm("mov r15, %0" : "=r"(ret) : );
111 void arch_lmb_reserve(struct lmb *lmb)
113 arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);