* Add support for MIPS32 4Kc CPUs

* Add support for INCA-IP Board

1 files changed, 276 insertions, 0 deletions

diff --git a/lib_mips/mips_linux.c b/lib_mips/mips_linux.c
new file mode 100644
index 0000000000..e73d4d8527
--- /dev/null
+++ b/lib_mips/mips_linux.c
@@ -0,0 +1,276 @@
+/*
+ * (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
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cmd_boot.h>
+#include <image.h>
+#include <zlib.h>
+#include <asm/byteorder.h>
+#include <asm/addrspace.h>
+
+#define	LINUX_MAX_ENVS		256
+#define	LINUX_MAX_ARGS		256
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+# include <status_led.h>
+# define SHOW_BOOT_PROGRESS(arg)	show_boot_progress(arg)
+#else
+# define SHOW_BOOT_PROGRESS(arg)
+#endif
+
+extern image_header_t header;           /* from cmd_bootm.c */
+
+static int	linux_argc;
+static char **	linux_argv;
+
+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);
+
+
+void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		ulong addr, ulong *len_ptr, int   verify)
+{
+    DECLARE_GLOBAL_DATA_PTR;
+
+    ulong len = 0, checksum;
+    ulong initrd_start, initrd_end;
+    ulong data;
+    void (*theKernel)(int, char **, char **, int *);
+    image_header_t *hdr = &header;
+    char *commandline = getenv("bootargs");
+    char env_buf[12];
+
+    theKernel = (void (*)(int, char **, char **, int *))ntohl(hdr->ih_ep);
+
+    /*
+     * Check if there is an initrd image
+     */
+    if (argc >= 3) {
+	SHOW_BOOT_PROGRESS (9);
+
+	addr = simple_strtoul(argv[2], NULL, 16);
+
+	printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
+
+	/* Copy header so we can blank CRC field for re-calculation */
+	memcpy (&header, (char *)addr, sizeof(image_header_t));
+
+	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	    printf ("Bad Magic Number\n");
+	    SHOW_BOOT_PROGRESS (-10);
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	data = (ulong)&header;
+	len  = sizeof(image_header_t);
+
+	checksum = ntohl(hdr->ih_hcrc);
+	hdr->ih_hcrc = 0;
+
+	if (crc32 (0, (char *)data, len) != checksum) {
+	    printf ("Bad Header Checksum\n");
+	    SHOW_BOOT_PROGRESS (-11);
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	SHOW_BOOT_PROGRESS (10);
+
+	print_image_hdr (hdr);
+
+	data = addr + sizeof(image_header_t);
+	len  = ntohl(hdr->ih_size);
+
+	if (verify) {
+	    ulong csum = 0;
+
+	    printf ("   Verifying Checksum ... ");
+	    csum = crc32 (0, (char *)data, len);
+	    if (csum != ntohl(hdr->ih_dcrc)) {
+		printf ("Bad Data CRC\n");
+	        SHOW_BOOT_PROGRESS (-12);
+		do_reset (cmdtp, flag, argc, argv);
+	    }
+	    printf ("OK\n");
+	}
+
+	SHOW_BOOT_PROGRESS (11);
+
+	if ((hdr->ih_os   != IH_OS_LINUX)	||
+	    (hdr->ih_arch != IH_CPU_MIPS)	||
+	    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
+	    printf ("No Linux MIPS Ramdisk Image\n");
+	    SHOW_BOOT_PROGRESS (-13);
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	/*
+	 * Now check if we have a multifile image
+	 */
+    } else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
+	ulong tail    = ntohl(len_ptr[0]) % 4;
+	int i;
+
+	SHOW_BOOT_PROGRESS (13);
+
+	/* skip kernel length and terminator */
+	data = (ulong)(&len_ptr[2]);
+	/* skip any additional image length fields */
+	for (i=1; len_ptr[i]; ++i)
+	  data += 4;
+	/* add kernel length, and align */
+	data += ntohl(len_ptr[0]);
+	if (tail) {
+	    data += 4 - tail;
+	}
+
+	len   = ntohl(len_ptr[1]);
+
+    } else {
+	/*
+	 * no initrd image
+	 */
+        SHOW_BOOT_PROGRESS (14);
+
+	data = 0;
+    }
+
+#ifdef	DEBUG
+    if (!data) {
+	printf ("No initrd\n");
+    }
+#endif
+
+    if (data) {
+	initrd_start = data;
+	initrd_end   = initrd_start + len;
+    } else {
+	initrd_start = 0;
+	initrd_end = 0;
+    }
+
+    SHOW_BOOT_PROGRESS (15);
+
+#ifdef DEBUG
+    printf ("## Transferring control to Linux (at address %08lx) ...\n",
+	    (ulong)theKernel);
+#endif
+
+    linux_params_init (PHYSADDR(gd->bd->bi_boot_params), commandline);
+
+    sprintf (env_buf, "%lu", gd->ram_size >> 20);
+    linux_env_set ("memsize", env_buf);
+
+    sprintf (env_buf, "0x%08X", (uint)PHYSADDR(initrd_start));
+    linux_env_set ("initrd_start", env_buf);
+
+    sprintf (env_buf, "0x%X", (uint)(initrd_end - initrd_start));
+    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);
+
+    /* we assume that the kernel is in place */
+    printf("\nStarting kernel ...\n\n");
+
+    theKernel(linux_argc, linux_argv, linux_env, 0);
+}
+
+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 != NULL && quote != NULL && 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 != NULL)
+	    {
+                quote = strchr (next + 1, '"');
+                next = strchr (next + 1, ' ');
+            }
+        }
+	
+	if (next == NULL)
+	{
+	    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;
+    }
+}