1 files changed, 157 insertions, 84 deletions

diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c
index ade9af4..66340ea 100644
--- a/arch/mips/lib/bootm.c
+++ b/arch/mips/lib/bootm.c
@@ -17,23 +17,148 @@ DECLARE_GLOBAL_DATA_PTR;
 #define	LINUX_MAX_ENVS		256
 #define	LINUX_MAX_ARGS		256
 
+#if defined(CONFIG_QEMU_MALTA)
+#define mips_boot_qemu_malta	1
+#else
+#define mips_boot_qemu_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);
+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_qemu_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 *commandline = getenv("bootargs");
 	char env_buf[12];
-	char *cp;
-
-	linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline);
+	const char *cp;
+	ulong rd_start, rd_size;
 
 #ifdef CONFIG_MEMSIZE_IN_BYTES
 	sprintf(env_buf, "%lu", (ulong)gd->ram_size);
@@ -41,15 +166,20 @@ static void boot_prep_linux(bootm_headers_t *images)
 #else
 	sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
 	debug("## Giving linux memsize in MB, %lu\n",
-		(ulong)(gd->ram_size >> 20));
+	      (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%08X", (uint) UNCACHED_SDRAM(images->rd_start));
+	sprintf(env_buf, "0x%08lX", rd_start);
 	linux_env_set("initrd_start", env_buf);
 
-	sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start));
+	sprintf(env_buf, "0x%lX", rd_size);
 	linux_env_set("initrd_size", env_buf);
 
 	sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
@@ -65,33 +195,42 @@ static void boot_prep_linux(bootm_headers_t *images)
 	cp = getenv("eth1addr");
 	if (cp)
 		linux_env_set("eth1addr", cp);
+
+	if (mips_boot_qemu_malta)
+		linux_env_set("modetty0", "38400n8r");
 }
 
 static void boot_jump_linux(bootm_headers_t *images)
 {
-	void (*theKernel) (int, char **, char **, int *);
-
-	/* find kernel entry point */
-	theKernel = (void (*)(int, char **, char **, int *))images->ep;
+	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 %08lx) ...\n",
-		(ulong) theKernel);
+	debug("## Transferring control to Linux (at address %p) ...\n", kernel);
 
 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
 
+	if (mips_boot_qemu_malta)
+		linux_extra = gd->ram_size;
+
 	/* we assume that the kernel is in place */
 	printf("\nStarting kernel ...\n\n");
 
-	theKernel(linux_argc, linux_argv, linux_env, 0);
+	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 || flag & BOOTM_STATE_OS_CMDLINE)
+	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;
@@ -102,76 +241,10 @@ int do_bootm_linux(int flag, int argc, char * const argv[],
 		return 0;
 	}
 
+	boot_cmdline_linux(images);
 	boot_prep_linux(images);
 	boot_jump_linux(images);
 
 	/* does not return */
 	return 1;
 }
-
-static void linux_params_init(ulong start, char *line)
-{
-	char *next, *quote, *argp;
-
-	linux_argc = 1;
-	linux_argv = (char **) start;
-	linux_argv[0] = 0;
-	argp = (char *) (linux_argv + LINUX_MAX_ARGS);
-
-	next = line;
-
-	while (line && *line && linux_argc < LINUX_MAX_ARGS) {
-		quote = strchr(line, '"');
-		next = strchr(line, ' ');
-
-		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 = line + strlen(line);
-
-		linux_argv[linux_argc] = argp;
-		memcpy(argp, line, next - line);
-		argp[next - line] = 0;
-
-		argp += next - line + 1;
-		linux_argc++;
-
-		if (*next)
-			next++;
-
-		line = next;
-	}
-
-	linux_env = (char **) (((ulong) 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(char *env_name, 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;
-
-		strcpy(linux_env_p, env_val);
-		linux_env_p += strlen(env_val);
-
-		linux_env_p++;
-		linux_env[++linux_env_idx] = 0;
-	}
-}