diff options
Diffstat (limited to 'qemu/roms/u-boot/arch/powerpc/lib/bootm.c')
| -rw-r--r-- | qemu/roms/u-boot/arch/powerpc/lib/bootm.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/arch/powerpc/lib/bootm.c b/qemu/roms/u-boot/arch/powerpc/lib/bootm.c new file mode 100644 index 000000000..33099a492 --- /dev/null +++ b/qemu/roms/u-boot/arch/powerpc/lib/bootm.c @@ -0,0 +1,341 @@ +/* + * (C) Copyright 2008 Semihalf + * + * (C) Copyright 2000-2006 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include <common.h> +#include <watchdog.h> +#include <command.h> +#include <image.h> +#include <malloc.h> +#include <u-boot/zlib.h> +#include <bzlib.h> +#include <environment.h> +#include <asm/byteorder.h> +#include <asm/mp.h> + +#if defined(CONFIG_OF_LIBFDT) +#include <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 (bd_t *kbd); + +#ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE +#define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024) +#endif + +static void boot_jump_linux(bootm_headers_t *images) +{ + void (*kernel)(bd_t *, 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 (*)(bd_t *, 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"); + WATCHDOG_RESET (); + (*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC, + getenv_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; + bd_t *kbd = images->kbd; + + debug (" Booting using board info...\n"); + WATCHDOG_RESET (); + (*kernel) (kbd, initrd_start, initrd_end, + cmd_start, cmd_end, 0, 0); + /* does not return */ + } + return ; +} + +void arch_lmb_reserve(struct lmb *lmb) +{ + phys_size_t bootm_size; + ulong size, sp, bootmap_base; + + bootmap_base = getenv_bootm_low(); + bootm_size = getenv_bootm_size(); + +#ifdef DEBUG + if (((u64)bootmap_base + bootm_size) > + (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size)) + puts("WARNING: bootm_low + bootm_size exceed total memory\n"); + if ((bootmap_base + bootm_size) > get_effective_memsize()) + puts("WARNING: bootm_low + bootm_size exceed eff. memory\n"); +#endif + + size = min(bootm_size, get_effective_memsize()); + size = min(size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE); + + if (size < bootm_size) { + ulong base = bootmap_base + size; + printf("WARNING: adjusting available memory to %lx\n", size); + lmb_reserve(lmb, base, bootm_size - size); + } + + /* + * Booting a (Linux) kernel image + * + * Allocate space for command line and board info - the + * address should be as high as possible within the reach of + * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused + * memory, which means far enough below the current stack + * pointer. + */ + sp = get_sp(); + debug ("## Current stack ends at 0x%08lx\n", sp); + + /* adjust sp by 4K to be safe */ + sp -= 4096; + lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp)); + +#ifdef CONFIG_MP + cpu_mp_lmb_reserve(lmb); +#endif + + return ; +} + +static void boot_prep_linux(bootm_headers_t *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(bootm_headers_t *images) +{ + ulong of_size = images->ft_len; + struct lmb *lmb = &images->lmb; + 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 (lmb, cmd_start, cmd_end); + if (ret) { + puts("ERROR with allocation of cmdline\n"); + return ret; + } + } + + return ret; +} + +static int boot_bd_t_linux(bootm_headers_t *images) +{ + ulong of_size = images->ft_len; + struct lmb *lmb = &images->lmb; + bd_t **kbd = &images->kbd; + + int ret = 0; + + if (!of_size) { + /* allocate space for kernel copy of board info */ + ret = boot_get_kbd (lmb, 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(bootm_headers_t *images) +{ + int ret; + + /* allocate space for kernel copy of board info */ + ret = boot_bd_t_linux(images); + if (ret) + return ret; + + ret = image_setup_linux(images); + if (ret) + return ret; + + return 0; +} + +noinline +int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *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 (bd_t *kbd) +{ + char *s; + + if ((s = getenv ("clocks_in_mhz")) != NULL) { + /* convert all clock information to MHz */ + kbd->bi_intfreq /= 1000000L; + kbd->bi_busfreq /= 1000000L; +#if defined(CONFIG_CPM2) + kbd->bi_cpmfreq /= 1000000L; + kbd->bi_brgfreq /= 1000000L; + kbd->bi_sccfreq /= 1000000L; + kbd->bi_vco /= 1000000L; +#endif +#if defined(CONFIG_MPC5xxx) + kbd->bi_ipbfreq /= 1000000L; + kbd->bi_pcifreq /= 1000000L; +#endif /* CONFIG_MPC5xxx */ + } +} + +#if defined(CONFIG_BOOTM_VXWORKS) +void boot_prep_vxworks(bootm_headers_t *images) +{ +#if defined(CONFIG_OF_LIBFDT) + int off; + u64 base, size; + + if (!images->ft_addr) + return; + + base = (u64)gd->bd->bi_memstart; + size = (u64)gd->bd->bi_memsize; + + 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(bootm_headers_t *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 + */ + WATCHDOG_RESET(); + + ((void (*)(void *, ulong, ulong, ulong, + ulong, ulong, ulong))images->ep)(images->ft_addr, + 0, 0, EPAPR_MAGIC, getenv_bootm_mapsize(), 0, 0); +} +#endif |