* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#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 void linux_params_init(ulong start, char *commandline);
-static void linux_env_set(char *env_name, char *env_val);
-
-int do_bootm_linux(int flag, int argc, char * const argv[],
- bootm_headers_t *images)
+static ulong arch_get_sp(void)
{
- void (*theKernel) (int, char **, char **, int *);
- char *commandline = getenv("bootargs");
- char env_buf[12];
- char *cp;
-
- if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
- return 1;
+ ulong ret;
- /* find kernel entry point */
- theKernel = (void (*)(int, char **, char **, int *))images->ep;
-
- bootstage_mark(BOOTSTAGE_ID_RUN_OS);
-
-#ifdef DEBUG
- printf("## Transferring control to Linux (at address %08lx) ...\n",
- (ulong) theKernel);
-#endif
+ __asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
- linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline);
-
-#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 */
-
- linux_env_set("memsize", env_buf);
+ return ret;
+}
- sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start));
- linux_env_set("initrd_start", env_buf);
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ ulong sp;
- sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start));
- linux_env_set("initrd_size", env_buf);
+ sp = arch_get_sp();
+ debug("## Current stack ends at 0x%08lx\n", sp);
- sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
- linux_env_set("flash_start", env_buf);
+ /* adjust sp by 4K to be safe */
+ sp -= 4096;
+ lmb_reserve(lmb, sp, CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp);
+}
- sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
- linux_env_set("flash_size", env_buf);
+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);
+}
- cp = getenv("ethaddr");
- if (cp)
- linux_env_set("ethaddr", cp);
+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;
- cp = getenv("eth1addr");
- if (cp)
- linux_env_set("eth1addr", cp);
+ linux_argp += len + 1;
+ linux_argc++;
+}
- /* we assume that the kernel is in place */
- printf("\nStarting kernel ...\n\n");
+static void linux_cmdline_dump(void)
+{
+ int i;
- theKernel(linux_argc, linux_argv, linux_env, 0);
+ debug("## cmdline argv at 0x%p, argp at 0x%p\n",
+ linux_argv, linux_argp);
- /* does not return */
- return 1;
+ for (i = 1; i < linux_argc; i++)
+ debug(" arg %03d: %s\n", i, linux_argv[i]);
}
-static void linux_params_init(ulong start, char *line)
+static void boot_cmdline_linux(bootm_headers_t *images)
{
- char *next, *quote, *argp;
+ const char *bootargs, *next, *quote;
- linux_argc = 1;
- linux_argv = (char **) start;
- linux_argv[0] = 0;
- argp = (char *) (linux_argv + LINUX_MAX_ARGS);
+ linux_cmdline_init();
- next = line;
+ bootargs = getenv("bootargs");
+ if (!bootargs)
+ return;
- while (line && *line && linux_argc < LINUX_MAX_ARGS) {
- quote = strchr(line, '"');
- next = strchr(line, ' ');
+ 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
+ /*
+ * we found a left quote before the next blank
* now we have to find the matching right quote
*/
next = strchr(quote + 1, '"');
}
if (!next)
- next = line + strlen(line);
-
- linux_argv[linux_argc] = argp;
- memcpy(argp, line, next - line);
- argp[next - line] = 0;
+ next = bootargs + strlen(bootargs);
- argp += next - line + 1;
- linux_argc++;
+ linux_cmdline_set(bootargs, next - bootargs);
if (*next)
next++;
- line = next;
+ bootargs = next;
}
- linux_env = (char **) (((ulong) argp + 15) & ~15);
+ 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_p = (char *)(linux_env + LINUX_MAX_ENVS);
linux_env_idx = 0;
}
-static void linux_env_set(char *env_name, char *env_val)
+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);
- strcpy(linux_env_p, "=");
- linux_env_p += 1;
+ 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[++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;
+}
projects / karo-tx-uboot.git / blobdiff