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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/byteorder.h>
#include <asm/addrspace.h>
DECLARE_GLOBAL_DATA_PTR;
#define LINUX_MAX_ENVS 256
#define LINUX_MAX_ARGS 256
#if defined(CONFIG_MALTA)
#define mips_boot_malta 1
#else
#define mips_boot_malta 0
#endif
static int linux_argc;
static char **linux_argv;
static char *linux_argp;
static char **linux_env;
static char *linux_env_p;
static int linux_env_idx;
static ulong arch_get_sp(void)
{
ulong ret;
__asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
return ret;
}
void arch_lmb_reserve(struct lmb *lmb)
{
ulong sp;
sp = arch_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 + gd->ram_size - sp);
}
static void linux_cmdline_init(void)
{
linux_argc = 1;
linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params);
linux_argv[0] = 0;
linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
}
static void linux_cmdline_set(const char *value, size_t len)
{
linux_argv[linux_argc] = linux_argp;
memcpy(linux_argp, value, len);
linux_argp[len] = 0;
linux_argp += len + 1;
linux_argc++;
}
static void linux_cmdline_dump(void)
{
int i;
debug("## cmdline argv at 0x%p, argp at 0x%p\n",
linux_argv, linux_argp);
for (i = 1; i < linux_argc; i++)
debug(" arg %03d: %s\n", i, linux_argv[i]);
}
static void boot_cmdline_linux(bootm_headers_t *images)
{
const char *bootargs, *next, *quote;
linux_cmdline_init();
bootargs = getenv("bootargs");
if (!bootargs)
return;
next = bootargs;
while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
quote = strchr(bootargs, '"');
next = strchr(bootargs, ' ');
while (next && quote && quote < next) {
/*
* we found a left quote before the next blank
* now we have to find the matching right quote
*/
next = strchr(quote + 1, '"');
if (next) {
quote = strchr(next + 1, '"');
next = strchr(next + 1, ' ');
}
}
if (!next)
next = bootargs + strlen(bootargs);
linux_cmdline_set(bootargs, next - bootargs);
if (*next)
next++;
bootargs = next;
}
linux_cmdline_dump();
}
static void linux_env_init(void)
{
linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
linux_env[0] = 0;
linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
linux_env_idx = 0;
}
static void linux_env_set(const char *env_name, const char *env_val)
{
if (linux_env_idx < LINUX_MAX_ENVS - 1) {
linux_env[linux_env_idx] = linux_env_p;
strcpy(linux_env_p, env_name);
linux_env_p += strlen(env_name);
if (mips_boot_malta) {
linux_env_p++;
linux_env[++linux_env_idx] = linux_env_p;
} else {
*linux_env_p++ = '=';
}
strcpy(linux_env_p, env_val);
linux_env_p += strlen(env_val);
linux_env_p++;
linux_env[++linux_env_idx] = 0;
}
}
static void boot_prep_linux(bootm_headers_t *images)
{
char env_buf[12];
const char *cp;
ulong rd_start, rd_size;
#ifdef CONFIG_MEMSIZE_IN_BYTES
sprintf(env_buf, "%lu", (ulong)gd->ram_size);
debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size);
#else
sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
debug("## Giving linux memsize in MB, %lu\n",
(ulong)(gd->ram_size >> 20));
#endif /* CONFIG_MEMSIZE_IN_BYTES */
rd_start = UNCACHED_SDRAM(images->initrd_start);
rd_size = images->initrd_end - images->initrd_start;
linux_env_init();
linux_env_set("memsize", env_buf);
sprintf(env_buf, "0x%08lX", rd_start);
linux_env_set("initrd_start", env_buf);
sprintf(env_buf, "0x%lX", rd_size);
linux_env_set("initrd_size", env_buf);
sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
linux_env_set("flash_start", env_buf);
sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
linux_env_set("flash_size", env_buf);
cp = getenv("ethaddr");
if (cp)
linux_env_set("ethaddr", cp);
cp = getenv("eth1addr");
if (cp)
linux_env_set("eth1addr", cp);
if (mips_boot_malta) {
sprintf(env_buf, "%un8r", gd->baudrate);
linux_env_set("modetty0", env_buf);
}
}
static void boot_jump_linux(bootm_headers_t *images)
{
typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
kernel_entry_t kernel = (kernel_entry_t) images->ep;
ulong linux_extra = 0;
debug("## Transferring control to Linux (at address %p) ...\n", kernel);
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
if (mips_boot_malta)
linux_extra = gd->ram_size;
/* we assume that the kernel is in place */
printf("\nStarting kernel ...\n\n");
kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env, linux_extra);
}
int do_bootm_linux(int flag, int argc, char * const argv[],
bootm_headers_t *images)
{
/* No need for those on MIPS */
if (flag & BOOTM_STATE_OS_BD_T)
return -1;
if (flag & BOOTM_STATE_OS_CMDLINE) {
boot_cmdline_linux(images);
return 0;
}
if (flag & BOOTM_STATE_OS_PREP) {
boot_prep_linux(images);
return 0;
}
if (flag & BOOTM_STATE_OS_GO) {
boot_jump_linux(images);
return 0;
}
boot_cmdline_linux(images);
boot_prep_linux(images);
boot_jump_linux(images);
/* does not return */
return 1;
}
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