| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2008 Semihalf |
| * |
| * (C) Copyright 2000-2006 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| */ |
| |
| #include <config.h> |
| #include <bootm.h> |
| #include <bootstage.h> |
| #include <cpu_func.h> |
| #include <env.h> |
| #include <init.h> |
| #include <log.h> |
| #include <watchdog.h> |
| #include <command.h> |
| #include <image.h> |
| #include <malloc.h> |
| #include <asm/global_data.h> |
| #include <u-boot/zlib.h> |
| #include <bzlib.h> |
| #include <asm/byteorder.h> |
| #include <asm/mp.h> |
| #include <bootm.h> |
| #include <vxworks.h> |
| |
| #if defined(CONFIG_OF_LIBFDT) |
| #include <linux/libfdt.h> |
| #include <fdt_support.h> |
| #endif |
| |
| #ifdef CONFIG_SYS_INIT_RAM_LOCK |
| #include <asm/cache.h> |
| #endif |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| static ulong get_sp (void); |
| extern void ft_fixup_num_cores(void *blob); |
| static void set_clocks_in_mhz (struct bd_info *kbd); |
| |
| static void boot_jump_linux(struct bootm_headers *images) |
| { |
| void (*kernel)(struct bd_info *, ulong r4, ulong r5, ulong r6, |
| ulong r7, ulong r8, ulong r9); |
| #ifdef CONFIG_OF_LIBFDT |
| char *of_flat_tree = images->ft_addr; |
| #endif |
| |
| kernel = (void (*)(struct bd_info *, ulong, ulong, ulong, |
| ulong, ulong, ulong))images->ep; |
| debug("## Transferring control to Linux (at address %08lx) ...\n", |
| (ulong)kernel); |
| |
| bootstage_mark(BOOTSTAGE_ID_RUN_OS); |
| |
| #ifdef CONFIG_BOOTSTAGE_FDT |
| bootstage_fdt_add_report(); |
| #endif |
| #ifdef CONFIG_BOOTSTAGE_REPORT |
| bootstage_report(); |
| #endif |
| |
| #if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500) |
| unlock_ram_in_cache(); |
| #endif |
| |
| #if defined(CONFIG_OF_LIBFDT) |
| if (of_flat_tree) { /* device tree; boot new style */ |
| /* |
| * Linux Kernel Parameters (passing device tree): |
| * r3: pointer to the fdt |
| * r4: 0 |
| * r5: 0 |
| * r6: epapr magic |
| * r7: size of IMA in bytes |
| * r8: 0 |
| * r9: 0 |
| */ |
| debug(" Booting using OF flat tree...\n"); |
| schedule(); |
| (*kernel) ((struct bd_info *)of_flat_tree, 0, 0, EPAPR_MAGIC, |
| env_get_bootm_mapsize(), 0, 0); |
| /* does not return */ |
| } else |
| #endif |
| { |
| /* |
| * Linux Kernel Parameters (passing board info data): |
| * r3: ptr to board info data |
| * r4: initrd_start or 0 if no initrd |
| * r5: initrd_end - unused if r4 is 0 |
| * r6: Start of command line string |
| * r7: End of command line string |
| * r8: 0 |
| * r9: 0 |
| */ |
| ulong cmd_start = images->cmdline_start; |
| ulong cmd_end = images->cmdline_end; |
| ulong initrd_start = images->initrd_start; |
| ulong initrd_end = images->initrd_end; |
| struct bd_info *kbd = images->kbd; |
| |
| debug(" Booting using board info...\n"); |
| schedule(); |
| (*kernel) (kbd, initrd_start, initrd_end, |
| cmd_start, cmd_end, 0, 0); |
| /* does not return */ |
| } |
| return; |
| } |
| |
| static void boot_prep_linux(struct bootm_headers *images) |
| { |
| #ifdef CONFIG_MP |
| /* |
| * if we are MP make sure to flush the device tree so any changes are |
| * made visibile to all other cores. In AMP boot scenarios the cores |
| * might not be HW cache coherent with each other. |
| */ |
| flush_cache((unsigned long)images->ft_addr, images->ft_len); |
| #endif |
| } |
| |
| static int boot_cmdline_linux(struct bootm_headers *images) |
| { |
| ulong of_size = images->ft_len; |
| ulong *cmd_start = &images->cmdline_start; |
| ulong *cmd_end = &images->cmdline_end; |
| |
| int ret = 0; |
| |
| if (!of_size) { |
| /* allocate space and init command line */ |
| ret = boot_get_cmdline(cmd_start, cmd_end); |
| if (ret) { |
| puts("ERROR with allocation of cmdline\n"); |
| return ret; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int boot_bd_t_linux(struct bootm_headers *images) |
| { |
| ulong of_size = images->ft_len; |
| struct bd_info **kbd = &images->kbd; |
| |
| int ret = 0; |
| |
| if (!of_size) { |
| /* allocate space for kernel copy of board info */ |
| ret = boot_get_kbd(kbd); |
| if (ret) { |
| puts("ERROR with allocation of kernel bd\n"); |
| return ret; |
| } |
| set_clocks_in_mhz(*kbd); |
| } |
| |
| return ret; |
| } |
| |
| static int boot_body_linux(struct bootm_headers *images) |
| { |
| int ret; |
| |
| /* allocate space for kernel copy of board info */ |
| ret = boot_bd_t_linux(images); |
| if (ret) |
| return ret; |
| |
| if (IS_ENABLED(CONFIG_LMB)) { |
| ret = image_setup_linux(images); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int do_bootm_linux(int flag, struct bootm_info *bmi) |
| { |
| struct bootm_headers *images = bmi->images; |
| int ret; |
| |
| if (flag & BOOTM_STATE_OS_CMDLINE) { |
| boot_cmdline_linux(images); |
| return 0; |
| } |
| |
| if (flag & BOOTM_STATE_OS_BD_T) { |
| boot_bd_t_linux(images); |
| return 0; |
| } |
| |
| if (flag & BOOTM_STATE_OS_PREP) { |
| boot_prep_linux(images); |
| return 0; |
| } |
| |
| boot_prep_linux(images); |
| ret = boot_body_linux(images); |
| if (ret) |
| return ret; |
| boot_jump_linux(images); |
| |
| return 0; |
| } |
| |
| static ulong get_sp (void) |
| { |
| ulong sp; |
| |
| asm( "mr %0,1": "=r"(sp) : ); |
| return sp; |
| } |
| |
| static void set_clocks_in_mhz (struct bd_info *kbd) |
| { |
| char *s; |
| |
| s = env_get("clocks_in_mhz"); |
| if (s) { |
| /* convert all clock information to MHz */ |
| kbd->bi_intfreq /= 1000000L; |
| kbd->bi_busfreq /= 1000000L; |
| } |
| } |
| |
| #if defined(CONFIG_BOOTM_VXWORKS) |
| void boot_prep_vxworks(struct bootm_headers *images) |
| { |
| #if defined(CONFIG_OF_LIBFDT) |
| int off; |
| u64 base, size; |
| |
| if (!images->ft_addr) |
| return; |
| |
| base = (u64)gd->ram_base; |
| size = (u64)gd->ram_size; |
| |
| off = fdt_path_offset(images->ft_addr, "/memory"); |
| if (off < 0) |
| fdt_fixup_memory(images->ft_addr, base, size); |
| |
| #if defined(CONFIG_MP) |
| #if defined(CONFIG_MPC85xx) |
| ft_fixup_cpu(images->ft_addr, base + size); |
| ft_fixup_num_cores(images->ft_addr); |
| #elif defined(CONFIG_MPC86xx) |
| off = fdt_add_mem_rsv(images->ft_addr, |
| determine_mp_bootpg(NULL), (u64)4096); |
| if (off < 0) |
| printf("## WARNING %s: %s\n", __func__, fdt_strerror(off)); |
| ft_fixup_num_cores(images->ft_addr); |
| #endif |
| flush_cache((unsigned long)images->ft_addr, images->ft_len); |
| #endif |
| #endif |
| } |
| |
| void boot_jump_vxworks(struct bootm_headers *images) |
| { |
| /* PowerPC VxWorks boot interface conforms to the ePAPR standard |
| * general purpuse registers: |
| * |
| * r3: Effective address of the device tree image |
| * r4: 0 |
| * r5: 0 |
| * r6: ePAPR magic value |
| * r7: shall be the size of the boot IMA in bytes |
| * r8: 0 |
| * r9: 0 |
| * TCR: WRC = 0, no watchdog timer reset will occur |
| */ |
| schedule(); |
| |
| ((void (*)(void *, ulong, ulong, ulong, |
| ulong, ulong, ulong))images->ep)(images->ft_addr, |
| 0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0); |
| } |
| #endif |