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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-23 18:38:51 +09:00
![Masahiro Yamada](/assets/img/avatar_default.png)
Commit e2f88dfd2d
("libfdt: Introduce new ARCH_FIXUP_FDT option")
allows us to skip memory setup of DTB, but a problem for ARM is that
spin_table_update_dt() and psci_update_dt() are skipped as well if
CONFIG_ARCH_FIXUP_FDT is disabled.
This commit allows us to skip only fdt_fixup_memory_banks() instead
of the whole of arch_fixup_fdt(). It will be useful when we want to
use a memory node from a kernel DTB as is, but need some fixups for
Spin-Table/PSCI.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fixed build error for x86:
Signed-off-by: Simon Glass <sjg@chromium.org>
351 lines
7.7 KiB
C
351 lines
7.7 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <image.h>
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#include <fdt_support.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define LINUX_MAX_ENVS 256
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#define LINUX_MAX_ARGS 256
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static int linux_argc;
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static char **linux_argv;
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static char *linux_argp;
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static char **linux_env;
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static char *linux_env_p;
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static int linux_env_idx;
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static ulong arch_get_sp(void)
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{
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ulong ret;
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__asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
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return ret;
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}
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void arch_lmb_reserve(struct lmb *lmb)
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{
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ulong sp;
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sp = arch_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, gd->ram_top - sp);
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}
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static void linux_cmdline_init(void)
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{
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linux_argc = 1;
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linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params);
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linux_argv[0] = 0;
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linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
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}
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static void linux_cmdline_set(const char *value, size_t len)
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{
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linux_argv[linux_argc] = linux_argp;
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memcpy(linux_argp, value, len);
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linux_argp[len] = 0;
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linux_argp += len + 1;
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linux_argc++;
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}
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static void linux_cmdline_dump(void)
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{
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int i;
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debug("## cmdline argv at 0x%p, argp at 0x%p\n",
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linux_argv, linux_argp);
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for (i = 1; i < linux_argc; i++)
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debug(" arg %03d: %s\n", i, linux_argv[i]);
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}
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static void linux_cmdline_legacy(bootm_headers_t *images)
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{
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const char *bootargs, *next, *quote;
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linux_cmdline_init();
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bootargs = getenv("bootargs");
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if (!bootargs)
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return;
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next = bootargs;
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while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
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quote = strchr(bootargs, '"');
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next = strchr(bootargs, ' ');
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while (next && quote && quote < next) {
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/*
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* we found a left quote before the next blank
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* now we have to find the matching right quote
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*/
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next = strchr(quote + 1, '"');
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if (next) {
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quote = strchr(next + 1, '"');
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next = strchr(next + 1, ' ');
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}
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}
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if (!next)
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next = bootargs + strlen(bootargs);
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linux_cmdline_set(bootargs, next - bootargs);
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if (*next)
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next++;
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bootargs = next;
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}
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}
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static void linux_cmdline_append(bootm_headers_t *images)
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{
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char buf[24];
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ulong mem, rd_start, rd_size;
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/* append mem */
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mem = gd->ram_size >> 20;
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sprintf(buf, "mem=%luM", mem);
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linux_cmdline_set(buf, strlen(buf));
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/* append rd_start and rd_size */
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rd_start = images->initrd_start;
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rd_size = images->initrd_end - images->initrd_start;
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if (rd_size) {
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sprintf(buf, "rd_start=0x%08lX", rd_start);
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linux_cmdline_set(buf, strlen(buf));
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sprintf(buf, "rd_size=0x%lX", rd_size);
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linux_cmdline_set(buf, strlen(buf));
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}
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}
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static void linux_env_init(void)
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{
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linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
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linux_env[0] = 0;
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linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
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linux_env_idx = 0;
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}
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static void linux_env_set(const char *env_name, const char *env_val)
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{
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if (linux_env_idx < LINUX_MAX_ENVS - 1) {
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linux_env[linux_env_idx] = linux_env_p;
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strcpy(linux_env_p, env_name);
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linux_env_p += strlen(env_name);
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if (CONFIG_IS_ENABLED(MALTA)) {
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linux_env_p++;
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linux_env[++linux_env_idx] = linux_env_p;
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} else {
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*linux_env_p++ = '=';
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}
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strcpy(linux_env_p, env_val);
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linux_env_p += strlen(env_val);
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linux_env_p++;
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linux_env[++linux_env_idx] = 0;
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}
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}
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static void linux_env_legacy(bootm_headers_t *images)
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{
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char env_buf[12];
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const char *cp;
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ulong rd_start, rd_size;
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if (CONFIG_IS_ENABLED(MEMSIZE_IN_BYTES)) {
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sprintf(env_buf, "%lu", (ulong)gd->ram_size);
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debug("## Giving linux memsize in bytes, %lu\n",
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(ulong)gd->ram_size);
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} else {
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sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
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debug("## Giving linux memsize in MB, %lu\n",
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(ulong)(gd->ram_size >> 20));
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}
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rd_start = UNCACHED_SDRAM(images->initrd_start);
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rd_size = images->initrd_end - images->initrd_start;
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linux_env_init();
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linux_env_set("memsize", env_buf);
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sprintf(env_buf, "0x%08lX", rd_start);
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linux_env_set("initrd_start", env_buf);
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sprintf(env_buf, "0x%lX", rd_size);
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linux_env_set("initrd_size", env_buf);
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sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
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linux_env_set("flash_start", env_buf);
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sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
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linux_env_set("flash_size", env_buf);
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cp = getenv("ethaddr");
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if (cp)
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linux_env_set("ethaddr", cp);
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cp = getenv("eth1addr");
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if (cp)
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linux_env_set("eth1addr", cp);
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if (CONFIG_IS_ENABLED(MALTA)) {
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sprintf(env_buf, "%un8r", gd->baudrate);
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linux_env_set("modetty0", env_buf);
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}
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}
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static int boot_reloc_ramdisk(bootm_headers_t *images)
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{
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ulong rd_len = images->rd_end - images->rd_start;
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/*
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* In case of legacy uImage's, relocation of ramdisk is already done
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* by do_bootm_states() and should not repeated in 'bootm prep'.
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*/
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if (images->state & BOOTM_STATE_RAMDISK) {
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debug("## Ramdisk already relocated\n");
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return 0;
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}
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return boot_ramdisk_high(&images->lmb, images->rd_start,
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rd_len, &images->initrd_start, &images->initrd_end);
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}
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static int boot_reloc_fdt(bootm_headers_t *images)
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{
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/*
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* In case of legacy uImage's, relocation of FDT is already done
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* by do_bootm_states() and should not repeated in 'bootm prep'.
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*/
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if (images->state & BOOTM_STATE_FDT) {
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debug("## FDT already relocated\n");
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return 0;
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}
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#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
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boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
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return boot_relocate_fdt(&images->lmb, &images->ft_addr,
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&images->ft_len);
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#else
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return 0;
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#endif
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}
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int arch_fixup_fdt(void *blob)
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{
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#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
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u64 mem_start = virt_to_phys((void *)gd->bd->bi_memstart);
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u64 mem_size = gd->ram_size;
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return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
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#else
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return 0;
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#endif
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}
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static int boot_setup_fdt(bootm_headers_t *images)
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{
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return image_setup_libfdt(images, images->ft_addr, images->ft_len,
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&images->lmb);
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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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boot_reloc_ramdisk(images);
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if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
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boot_reloc_fdt(images);
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boot_setup_fdt(images);
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} else {
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if (CONFIG_IS_ENABLED(CONFIG_MIPS_BOOT_ENV_LEGACY))
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linux_env_legacy(images);
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if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
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linux_cmdline_legacy(images);
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if (!CONFIG_IS_ENABLED(CONFIG_MIPS_BOOT_ENV_LEGACY))
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linux_cmdline_append(images);
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linux_cmdline_dump();
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}
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}
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}
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static void boot_jump_linux(bootm_headers_t *images)
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{
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typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
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kernel_entry_t kernel = (kernel_entry_t) images->ep;
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ulong linux_extra = 0;
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debug("## Transferring control to Linux (at address %p) ...\n", kernel);
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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if (CONFIG_IS_ENABLED(MALTA))
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linux_extra = gd->ram_size;
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#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
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bootstage_fdt_add_report();
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#endif
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#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
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bootstage_report();
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#endif
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if (images->ft_len)
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kernel(-2, (ulong)images->ft_addr, 0, 0);
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else
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kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
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linux_extra);
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}
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int do_bootm_linux(int flag, int argc, char * const argv[],
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bootm_headers_t *images)
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{
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/* No need for those on MIPS */
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if (flag & BOOTM_STATE_OS_BD_T)
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return -1;
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/*
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* Cmdline init has been moved to 'bootm prep' because it has to be
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* done after relocation of ramdisk to always pass correct values
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* for rd_start and rd_size to Linux kernel.
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*/
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if (flag & BOOTM_STATE_OS_CMDLINE)
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return 0;
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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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if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
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boot_jump_linux(images);
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return 0;
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}
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/* does not return */
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return 1;
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}
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