Added C7200 support (thanks to V�g� Tibor).

.gitignore

@@ -0,0 +1,3 @@
+*.o
+*.elf
+*.bin

Makefile

@@ -30,6 +30,17 @@ LDFLAGS=-Ttext ${TEXTADDR}
 # endif
 # LDFLAGS=-Ttext=${TEXTADDR}
 
+# Configuration for the Cisco 7200 Series Routers
+# TARGET=c7200
+# MACHCODE=0x19
+# TEXTADDR=0x80008000
+# LOADADDR=0x80028000
+# ifndef CROSS_COMPILE
+# CROSS_COMPILE=mips-elf-
+# endif
+# CFLAGS=-DDEBUG -mno-abicalls
+# LDFLAGS=-Ttext ${TEXTADDR}
+
 # additional CFLAGS
 CFLAGS+=
 

include/mach/c7200/platform.h

@@ -0,0 +1,15 @@
+#ifndef _INCLUDE_MACH_C7200_PLATFORM_H
+#define _INCLUDE_MACH_C7200_PLATFORM_H
+
+#include <types.h>
+
+#define FLASH_BASE 0xBA000000
+#define FLASHFS_BASE 0xBA040000
+#define KERNEL_ENTRY_POINT 0x80008000
+#define MEMORY_BASE 0x80000000
+
+void platform_init();
+uint32_t check_flash();
+void flash_directory();
+
+#endif /* _INCLUDE_MACH_C7200_PLATFORM_H */

include/mach/c7200/platio.h

@@ -0,0 +1,37 @@
+#ifndef _INCLUDE_MACH_C7200_PLATIO
+#define _INCLUDE_MACH_C7200_PLATIO
+
+#include <types.h>
+#include <ciloio.h>
+
+/* a flash filesystem entry for the C7200 */
+struct fs_ent {
+    uint32_t magic;	/* C7200 bootflash filesystem magi number */
+    uint32_t fileno;	/* number of the file */
+    char filename[64];	/* 64bytes filename string*/
+    uint32_t length;	/* size of the file in bytes */
+    uint32_t seek;	/* address of the next fs_ent from FLASH_BASE (0xBA000000) and not FLASHFS_BASE (0xBA040000) */
+    uint32_t crc32;	/* CRC32 value of the file */
+    uint32_t type;	/* file type (ascii or binary etc.) */
+    uint32_t date;	/* the file last modification time in UNIX time */
+    /* todo: figure out exactly what these two fields contain */
+    uint32_t sg01;	/* 0xffffffffh */
+    uint32_t sg02;	/* 0xfffffff8h */
+    uint32_t sg03;	/* 0xffffffffh */
+    uint32_t sg04;	/* 0xffffffffh */
+    uint32_t sg05;	/* 0xffffffffh */
+    uint32_t sg06;	/* 0xffffffffh */
+    uint32_t sg07;	/* 0xffffffffh */
+    uint32_t sg08;	/* 0xffffffffh */
+    uint32_t sg09;	/* 0xffffffffh */
+};
+
+void platio_file_open(struct file *fp, const char *filename);
+
+uint32_t platio_read(void *pbuf, uint32_t size, uint32_t nmemb, struct file *fp);
+
+uint8_t platio_find_file(const char *filename);
+
+#define FS_FILE_MAGIC 0x07158805
+
+#endif /* _INCLUDE_MACH_C7200_PLATIO */

mach/c7200/Makefile

@@ -0,0 +1,18 @@
+ifndef CROSS_COMPILE
+CROSS_COMPILE=mips-elf-
+endif
+
+OBJECTS=start.o promlib.o platform.o platio.o
+
+INCLUDE=-I../../include
+
+all: ${OBJECTS}
+
+.c.o:
+	$(CC) ${CFLAGS} ${INCLUDE} -c $<
+
+.S.o:
+	$(CC) ${CFLAGS} ${INCLUDE} ${ASFLAGS} -c $<
+
+clean:
+	-rm -f *.o

mach/c7200/platform.c

@@ -0,0 +1,44 @@
+#include <types.h>
+#include <mach/c7200/platform.h>
+#include <mach/c7200/platio.h>
+#include <printf.h>
+
+/**
+ * perform hardware-specifc initialization for this platform
+ */
+void platform_init()
+{
+}
+
+/**
+ * Perform a sanity check on flash
+ * @returns 0 if no flash found, number of flash devices found otherwise
+ */
+uint32_t check_flash()
+{
+    uint32_t *ptr = (uint32_t *)FLASHFS_BASE;
+
+    if (*ptr != FS_FILE_MAGIC) {
+        return 0;
+    }
+
+    return 1;
+    /* TODO: add support for PCMCIA flash */
+}
+
+/**
+ * print a directory listing of the 'main' flash device in the system
+ */
+
+void flash_directory()
+{
+    struct fs_ent *f = (struct fs_ent *)FLASHFS_BASE;
+    uint32_t offset = 0;
+
+    /* Iterate over the files; f->magic is 0 if an invalid file is found. */
+    while (f->magic == FS_FILE_MAGIC) {
+        printf("%s\n", f->filename);
+        offset += sizeof(struct fs_ent) + f->length;
+        f = (struct fs_ent *)(FLASHFS_BASE + offset);
+    }
+}

mach/c7200/platio.c

@@ -0,0 +1,97 @@
+/* Platform specific operations for I/O for the cisco 7200 Series
+ * (C) 2008 Philippe Vachon <philippe@cowpig.ca>
+ * 
+ * Licensed under the GNU General Public License v2.
+ */
+#include <types.h>
+#include <mach/c7200/platio.h>
+#include <ciloio.h>
+#include <string.h>
+
+#include <mach/c7200/platform.h>
+
+/* find file in filesystem starting at base */
+struct fs_ent *find_file(const char *filename, uint32_t base)
+{
+    /* Actual file offset */
+    uint32_t offset = 0;
+
+    struct fs_ent *f = (struct fs_ent *)(base + offset);
+
+    /* iterate over files in flash */
+    while (f->magic == FS_FILE_MAGIC) {
+        if (!strncmp(f->filename, filename, 64)) {
+            return f;
+        }
+
+        offset += sizeof(struct fs_ent) + f->length;
+        f = (struct fs_ent *)(base + offset);
+    }
+
+    return NULL;
+}
+
+/**
+ * Find a file within the platform-supported I/O devices
+ * @param filename the file
+ * @returns 0 on failure, device ID number on success
+ */
+uint8_t platio_find_file(const char *filename)
+{
+    if (find_file(filename, FLASHFS_BASE)) {
+        return 1;
+    }
+    /* todo: add support for PCMCIA devices */
+
+    return 0;
+}
+
+/**
+ * Open a file.
+ * @param fp File structure to hold file information
+ * @param filename name of the file
+ */
+void platio_file_open(struct file *fp, const char *filename)
+{
+    struct fs_ent *ent = find_file(filename, FLASHFS_BASE);
+
+    if (ent == NULL) {
+        fp->code = 0;
+        fp->private = NULL;
+        return;
+    }
+
+    fp->dev = 1; /* TODO: add support for PCMCIA flash */
+
+    fp->private = (void *)ent;
+
+    fp->file_len = ent->length;
+    fp->file_pos = 0;
+
+    /* copy the filename */
+    strncpy(fp->filename, ent->filename, 64);
+
+    fp->code = 1;
+    
+}
+
+/**
+ * Read data from a given file
+ * @param pbuf Buffer to read data into
+ * @param size size of entity to be read
+ * @param nmemb number of members to read
+ * @param fp file information structure to read from.
+ * @returns number of bytes read (should = size * nmemb for C7200)
+ */
+uint32_t platio_read(void *pbuf, uint32_t size, uint32_t nmemb, struct file *fp)
+{
+    /* calculate the effective offset of the data we want to read: */
+    char *from = (char *)((uint32_t)(fp->private) + sizeof(struct fs_ent) + fp->file_pos);
+
+    memcpy(pbuf, from, size * nmemb);
+
+    fp->file_pos += size * nmemb;
+
+    return nmemb * size;
+
+}

mach/c7200/promlib.c

@@ -0,0 +1,206 @@
+/**
+ * PROM Library for Cisco Systems 7200 Series Routers
+ * (C) 2008 Philippe Vachon <philippe@cowpig.ca>
+ * -----------------------------------------------------------
+ */
+
+/**
+ * Calling convention:
+ * a0 - syscall number
+ * a1 - arg1 ... etc
+ * v0 - returned value from syscall
+ */
+
+#include <promlib.h>
+
+/* putc - Syscall 1
+ * output character c to console
+ * @param c ASCII number for character
+ */
+void c_putc(const char c)
+{
+    asm ( ".set noreorder\n "
+          "li $a0, %[syscall]\n"
+         "lb $a1, (%[character])\n" 
+          "syscall\n"
+          "nop\n"
+          ".set reorder\n"
+    : /* no output */
+    : [character] "r"(&c), [syscall] "g"(PUTC)
+    : "a0", "a1"
+    );
+}
+
+/* puts - wrapper for putc
+ * output the string pointed to by s
+ * @param s String to be written to the console
+ */
+void c_puts(const char *s)
+{
+    while(*s != '\0') {
+        c_putc(*(s++));
+    }
+}
+
+/* putsn - put a string of length n on the console
+ * @param s string to be written
+ * @param n length
+ */
+void c_putsn(const char *s, int n)
+{
+    int i = 0;
+    while (*s != '\0' && i != n) {
+        c_putc(*(s++));
+        i++;
+    }
+}
+
+
+/* getc - Syscall n
+ * get one character of input from the console
+ * @return ASCII code for character read from console
+ */
+char c_getc(void)
+{
+    char c;
+
+    asm ( ".set noreorder\n "
+           "li $a0, %[syscall]\n"
+           "syscall\n"
+           "nop\n"
+           "move %[charout], $v0 \n"
+           ".set reorder\n"
+    : [charout] "=r" (c)
+    : [syscall] "g" (GETC)
+    : "a0","v0"
+    );
+
+    return c;
+}
+
+/* gets - wrapper for getc
+ * reads up to n characters into buffer b
+ * @param b Buffer to read characters into
+ * @param n size of buffer
+ * @return the number of characters read into b
+ */
+int c_gets(char *b, int n)
+{
+    int i = 0;
+    do {
+        b[i] = c_getc();
+        c_putc(b[i]);
+        i++;
+        if (b[i - 1] == '\n' || b[i-1] == '\r') {
+            break;
+        }
+        else if (b[i - 1] == 0x8) {
+            i--;
+        }
+    } while (i < n);
+
+    b[i - 1] = '\0';
+
+    return i;
+
+}
+
+/* c_version - get version string
+ * @return pointer to version string
+ */
+char *c_verstr(void)
+{
+    char *c;
+
+    asm ( ".set noreorder\n"
+          "li $a0, %[syscall]\n"
+          "syscall\n"
+          "nop\n"
+          "move %[result], $v0\n"
+          ".set reorder\n"
+          : [result] "=r" (c)
+          : [syscall] "g" (VERSION)
+          : "a0", "v0"
+    );
+
+    return c;
+}
+
+/* memsz - get total memory size (in bytes)
+ * @return the size of the memory installed in the router, in bytes
+ */
+int c_memsz(void)
+{
+    int r = 0;
+
+    asm ( " .set noreorder \n"
+            "li $a0, %[syscall]\n"
+            "syscall\n"
+            "nop\n"
+            "move %[result], $v0\n"
+            ".set reorder\n"
+            : [result] "=r" (r)
+            : [syscall] "g" (MEMSIZE)
+            : "a0","v0"
+    );
+
+    return r;
+}
+
+/* timer - get number of ticks from timer
+ * @return the value in the timer
+ */
+long c_timer(void)
+{
+    long t = 0;
+    
+    asm (" .set noreorder\n"
+           "li $a0, %[syscall]\n"
+           "syscall\n"
+           "nop\n"
+           "move %[result], $a0\n"
+           ".set reorder\n"
+         : [result]"=r"(t)
+         : [syscall]"g"(TIMER)
+         : "a0","v0"
+    );
+
+    return t;
+}
+
+/* String length with a maximum length allowed
+ * @param s pointer to string
+ * @param maxlen maximum length
+ */
+int c_strnlen(const char *s, int maxlen)
+{
+    int i = 0;
+    if (!s) return 0;
+
+    while (*(s++) != '\0' && i != maxlen) {
+        i++;
+    }
+
+    return i;
+}
+
+/* baud - get console baud rate
+ * @return boot console baud rate
+ */
+int c_baud(void)
+{
+    int b = 0;
+
+    asm volatile (".set noreorder\n"
+                  "li $a0, %[syscall]\n"
+                  "syscall\n"
+                  "nop\n"
+                  "move %[result], $a0\n"
+                  ".set reorder\n"
+        : [result]"=r"(b)
+        : [syscall]"g"(GETBAUD)
+        : "a0", "v0"
+    );
+
+	return b;
+}

mach/c7200/start.S

@@ -0,0 +1,52 @@
+/* Initial entry point for ciscoboot. Sets up some stack at 0x80008000
+ * and jumps to main
+ */
+
+#include <asm/regdef.h>
+#include <asm/asm.h>
+
+EXPORT(_start)
+
+.extern start_bootloader 
+
+LEAF(_start)
+    .set noreorder
+    li sp, 0x80008000
+    
+    /* Save return address */
+    sw ra, -4(sp)
+
+    /* print out a letter C */
+    li a0, 1 
+    li a1, 67 
+    syscall
+    nop
+
+    /* get the total amount of RAM */
+    li a0, 4
+    syscall
+    nop
+
+    /* set the stack at the top of RAM */
+    li sp, 0x80000000
+    add sp, sp, v0
+
+    /* save return address*/
+    /*sw ra, -4(sp)
+
+    addi sp, sp, -4 */
+
+    /* start bootloader */
+    jal start_bootloader
+    nop
+
+    /* bootloader failed for some reason: */
+    li sp, 0x80008000
+
+    /* re-load return address to ROM: */
+    ld ra, -4(sp)
+
+    jr ra
+
+    .set reorder
+    END(_start)