339 lines
7.5 KiB
C
339 lines
7.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2008 Semihalf
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*
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* (C) Copyright 2000-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <image.h>
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#include <malloc.h>
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#include <u-boot/zlib.h>
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#include <bzlib.h>
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#include <environment.h>
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#include <asm/byteorder.h>
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#include <asm/mp.h>
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#include <bootm.h>
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#include <vxworks.h>
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#if defined(CONFIG_OF_LIBFDT)
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#include <linux/libfdt.h>
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#include <fdt_support.h>
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#endif
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#ifdef CONFIG_SYS_INIT_RAM_LOCK
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#include <asm/cache.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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static ulong get_sp (void);
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extern void ft_fixup_num_cores(void *blob);
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static void set_clocks_in_mhz (bd_t *kbd);
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#ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
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#define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
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#endif
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static void boot_jump_linux(bootm_headers_t *images)
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{
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void (*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
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ulong r7, ulong r8, ulong r9);
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#ifdef CONFIG_OF_LIBFDT
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char *of_flat_tree = images->ft_addr;
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#endif
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kernel = (void (*)(bd_t *, ulong, ulong, ulong,
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ulong, ulong, ulong))images->ep;
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debug ("## Transferring control to Linux (at address %08lx) ...\n",
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(ulong)kernel);
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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#ifdef CONFIG_BOOTSTAGE_FDT
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bootstage_fdt_add_report();
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#endif
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#ifdef CONFIG_BOOTSTAGE_REPORT
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bootstage_report();
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#endif
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#if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
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unlock_ram_in_cache();
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#endif
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#if defined(CONFIG_OF_LIBFDT)
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if (of_flat_tree) { /* device tree; boot new style */
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/*
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* Linux Kernel Parameters (passing device tree):
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* r3: pointer to the fdt
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* r4: 0
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* r5: 0
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* r6: epapr magic
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* r7: size of IMA in bytes
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* r8: 0
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* r9: 0
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*/
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debug (" Booting using OF flat tree...\n");
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WATCHDOG_RESET ();
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(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
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env_get_bootm_mapsize(), 0, 0);
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/* does not return */
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} else
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#endif
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{
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/*
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* Linux Kernel Parameters (passing board info data):
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* r3: ptr to board info data
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* r4: initrd_start or 0 if no initrd
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* r5: initrd_end - unused if r4 is 0
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* r6: Start of command line string
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* r7: End of command line string
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* r8: 0
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* r9: 0
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*/
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ulong cmd_start = images->cmdline_start;
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ulong cmd_end = images->cmdline_end;
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ulong initrd_start = images->initrd_start;
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ulong initrd_end = images->initrd_end;
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bd_t *kbd = images->kbd;
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debug (" Booting using board info...\n");
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WATCHDOG_RESET ();
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(*kernel) (kbd, initrd_start, initrd_end,
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cmd_start, cmd_end, 0, 0);
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/* does not return */
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}
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return ;
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}
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void arch_lmb_reserve(struct lmb *lmb)
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{
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phys_size_t bootm_size;
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ulong size, sp, bootmap_base;
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bootmap_base = env_get_bootm_low();
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bootm_size = env_get_bootm_size();
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#ifdef DEBUG
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if (((u64)bootmap_base + bootm_size) >
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(CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
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puts("WARNING: bootm_low + bootm_size exceed total memory\n");
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if ((bootmap_base + bootm_size) > get_effective_memsize())
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puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
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#endif
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size = min(bootm_size, get_effective_memsize());
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size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
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if (size < bootm_size) {
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ulong base = bootmap_base + size;
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printf("WARNING: adjusting available memory to %lx\n", size);
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lmb_reserve(lmb, base, bootm_size - size);
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}
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/*
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* Booting a (Linux) kernel image
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*
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* Allocate space for command line and board info - the
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* address should be as high as possible within the reach of
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* the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
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* memory, which means far enough below the current stack
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* pointer.
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*/
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sp = get_sp();
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debug ("## Current stack ends at 0x%08lx\n", sp);
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/* adjust sp by 4K to be safe */
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sp -= 4096;
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lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));
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#ifdef CONFIG_MP
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cpu_mp_lmb_reserve(lmb);
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#endif
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return ;
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}
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static void boot_prep_linux(bootm_headers_t *images)
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{
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#ifdef CONFIG_MP
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/*
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* if we are MP make sure to flush the device tree so any changes are
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* made visibile to all other cores. In AMP boot scenarios the cores
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* might not be HW cache coherent with each other.
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*/
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flush_cache((unsigned long)images->ft_addr, images->ft_len);
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#endif
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}
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static int boot_cmdline_linux(bootm_headers_t *images)
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{
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ulong of_size = images->ft_len;
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struct lmb *lmb = &images->lmb;
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ulong *cmd_start = &images->cmdline_start;
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ulong *cmd_end = &images->cmdline_end;
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int ret = 0;
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if (!of_size) {
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/* allocate space and init command line */
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ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
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if (ret) {
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puts("ERROR with allocation of cmdline\n");
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return ret;
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}
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}
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return ret;
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}
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static int boot_bd_t_linux(bootm_headers_t *images)
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{
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ulong of_size = images->ft_len;
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struct lmb *lmb = &images->lmb;
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bd_t **kbd = &images->kbd;
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int ret = 0;
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if (!of_size) {
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/* allocate space for kernel copy of board info */
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ret = boot_get_kbd (lmb, kbd);
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if (ret) {
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puts("ERROR with allocation of kernel bd\n");
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return ret;
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}
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set_clocks_in_mhz(*kbd);
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}
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return ret;
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}
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static int boot_body_linux(bootm_headers_t *images)
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{
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int ret;
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/* allocate space for kernel copy of board info */
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ret = boot_bd_t_linux(images);
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if (ret)
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return ret;
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ret = image_setup_linux(images);
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if (ret)
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return ret;
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return 0;
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}
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noinline
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int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
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{
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int ret;
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if (flag & BOOTM_STATE_OS_CMDLINE) {
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boot_cmdline_linux(images);
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return 0;
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}
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if (flag & BOOTM_STATE_OS_BD_T) {
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boot_bd_t_linux(images);
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return 0;
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}
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if (flag & BOOTM_STATE_OS_PREP) {
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boot_prep_linux(images);
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return 0;
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}
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boot_prep_linux(images);
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ret = boot_body_linux(images);
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if (ret)
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return ret;
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boot_jump_linux(images);
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return 0;
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}
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static ulong get_sp (void)
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{
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ulong sp;
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asm( "mr %0,1": "=r"(sp) : );
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return sp;
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}
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static void set_clocks_in_mhz (bd_t *kbd)
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{
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char *s;
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s = env_get("clocks_in_mhz");
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if (s) {
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/* convert all clock information to MHz */
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kbd->bi_intfreq /= 1000000L;
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kbd->bi_busfreq /= 1000000L;
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#if defined(CONFIG_CPM2)
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kbd->bi_cpmfreq /= 1000000L;
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kbd->bi_brgfreq /= 1000000L;
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kbd->bi_sccfreq /= 1000000L;
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kbd->bi_vco /= 1000000L;
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#endif
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}
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}
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#if defined(CONFIG_BOOTM_VXWORKS)
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void boot_prep_vxworks(bootm_headers_t *images)
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{
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#if defined(CONFIG_OF_LIBFDT)
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int off;
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u64 base, size;
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if (!images->ft_addr)
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return;
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base = (u64)gd->bd->bi_memstart;
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size = (u64)gd->bd->bi_memsize;
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off = fdt_path_offset(images->ft_addr, "/memory");
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if (off < 0)
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fdt_fixup_memory(images->ft_addr, base, size);
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#if defined(CONFIG_MP)
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#if defined(CONFIG_MPC85xx)
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ft_fixup_cpu(images->ft_addr, base + size);
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ft_fixup_num_cores(images->ft_addr);
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#elif defined(CONFIG_MPC86xx)
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off = fdt_add_mem_rsv(images->ft_addr,
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determine_mp_bootpg(NULL), (u64)4096);
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if (off < 0)
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printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
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ft_fixup_num_cores(images->ft_addr);
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#endif
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flush_cache((unsigned long)images->ft_addr, images->ft_len);
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#endif
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#endif
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}
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void boot_jump_vxworks(bootm_headers_t *images)
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{
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/* PowerPC VxWorks boot interface conforms to the ePAPR standard
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* general purpuse registers:
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*
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* r3: Effective address of the device tree image
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* r4: 0
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* r5: 0
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* r6: ePAPR magic value
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* r7: shall be the size of the boot IMA in bytes
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* r8: 0
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* r9: 0
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* TCR: WRC = 0, no watchdog timer reset will occur
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*/
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WATCHDOG_RESET();
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((void (*)(void *, ulong, ulong, ulong,
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ulong, ulong, ulong))images->ep)(images->ft_addr,
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0, 0, EPAPR_MAGIC, env_get_bootm_mapsize(), 0, 0);
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}
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#endif
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