Cisco c2610 support.
parent
1e53ccbe5c
commit
8af0261a51
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#ifndef _INCLUDE_MACH_C2600_PLATFORM_H
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#define _INCLUDE_MACH_C2600_PLATFORM_H
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#include <types.h>
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#define FLASH_BASE 0x60000000
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#define MEMORY_BASE 0x80000000
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void platform_init();
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uint32_t check_flash();
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void flash_directory();
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uint32_t locate_stage_two();
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void stage_two(uint32_t kern_off, uint32_t kern_entry, uint32_t kern_size,
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uint32_t kern_loadpt);
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#endif /* _INCLUDE_MACH_C2600_PLATFORM_H */
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#ifndef _INCLUDE_MACH_C2600_PLATIO
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#define _INCLUDE_MACH_C2600_PLATIO
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#include <types.h>
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#include <ciloio.h>
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/* a flash filesystem entry for the C2600 */
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struct fs_ent {
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uint32_t magic;
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uint32_t length;
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/* todo: figure out exactly what these two fields contain */
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uint32_t crc32;
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uint32_t date;
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char filename[48];
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};
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void platio_file_open(struct file *fp, const char *filename);
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uint32_t platio_read(void *pbuf, uint32_t size, uint32_t nmemb,
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struct file *fp);
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uint8_t platio_find_file(const char *filename);
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#define FS_FILE_MAGIC 0xbad00b1e
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#endif /* _INCLUDE_MACH_C2600_PLATIO */
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@ -0,0 +1,18 @@
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ifndef CROSS_COMPILE
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CROSS_COMPILE=powerpc-elf-
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endif
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OBJECTS=start.o promlib.o platform.o platio.o
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INCLUDE=-I../../include
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all: ${OBJECTS}
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.c.o:
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$(CC) ${CFLAGS} ${INCLUDE} -c $<
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.S.o:
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$(CC) ${CFLAGS} ${INCLUDE} ${ASFLAGS} -c $<
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clean:
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-rm -f *.o
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@ -0,0 +1,75 @@
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/* Platform-specific operations for the Cisco 2600 Series router
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* (c) 2009 Philippe Vachon <philippe@cowpig.ca>
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*
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* Licensed under the GNU General Public License v.2.0. See the COPYING
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* file in the root directory of this source distribution for more info.
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*/
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#include <types.h>
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#include <mach/c2600/platform.h>
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#include <mach/c2600/platio.h>
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#include <printf.h>
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/**
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* perform hardware-specifc initialization for this platform
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*/
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void platform_init()
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{
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}
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/**
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* Perform a sanity check on flash
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* @returns 0 if no flash found, number of flash devices found otherwise
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*/
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uint32_t check_flash()
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{
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uint32_t *ptr = (uint32_t *)FLASH_BASE;
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if (*ptr != FS_FILE_MAGIC) {
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return 0;
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}
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return 1;
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/* TODO: add support for PCMCIA flash */
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}
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/**
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* print a directory listing of the 'main' flash device in the system
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*/
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void flash_directory()
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{
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struct fs_ent *f = (struct fs_ent *)FLASH_BASE;
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uint32_t offset = 0;
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/* Iterate over the files; f->magic is 0 if an invalid file is found. */
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while (f->magic == FS_FILE_MAGIC) {
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printf("%s\n", f->filename);
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offset += sizeof(struct fs_ent) + f->length;
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f = (struct fs_ent *)(FLASH_BASE + offset);
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}
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}
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/**
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* Locate the stage two loader for CiscoLoad for this particular platform
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* returns 0 if not found, 1 if found
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*/
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uint32_t locate_stage_two()
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{
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return platio_find_file("ciscoload.two");
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}
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/**
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* Kick into the stage two loader.
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*/
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void stage_two(uint32_t kern_off, uint32_t kern_entry, uint32_t kern_size,
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uint32_t kern_loadpt)
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{
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uint32_t s2addr = ((uint32_t)find_file("ciscoload.two", FLASH_BASE)) +
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sizeof(struct fs_ent);
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((void (*)(uint32_t data_offset, uint32_t data_length, uint32_t entry_pt,
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uint32_t load_offset)) (s2addr))
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(kern_off, kern_size, kern_entry, kern_loadpt);
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}
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/* Platform specific operations for I/O for the cisco 2600 Series
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* (C) 2008 Philippe Vachon <philippe@cowpig.ca>
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*
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* Licensed under the GNU General Public License v2.
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*/
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#include <types.h>
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#include <mach/c2600/platio.h>
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#include <ciloio.h>
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#include <string.h>
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#include <mach/c2600/platform.h>
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/* find file in filesystem starting at base */
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struct fs_ent *find_file(const char *filename, uint32_t base)
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{
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/* Actual file offset */
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uint32_t offset = 0;
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struct fs_ent *f = (struct fs_ent *)(base + offset);
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/* iterate over files in flash */
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while (f->magic == FS_FILE_MAGIC) {
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if (!strncmp(f->filename, filename, 48)) {
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return f;
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}
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offset += sizeof(struct fs_ent) + f->length;
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f = (struct fs_ent *)(base + offset);
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}
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return NULL;
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}
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/**
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* Find a file within the platform-supported I/O devices
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* @param filename the file
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* @returns 0 on failure, device ID number on success
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*/
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uint8_t platio_find_file(const char *filename)
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{
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if (find_file(filename, FLASH_BASE)) {
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return 1;
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}
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/* todo: add support for PCMCIA devices */
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return 0;
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}
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/**
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* Open a file.
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* @param fp File structure to hold file information
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* @param filename name of the file
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*/
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void platio_file_open(struct file *fp, const char *filename)
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{
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struct fs_ent *ent = find_file(filename, FLASH_BASE);
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if (ent == NULL) {
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fp->code = 0;
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fp->private = NULL;
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return;
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}
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fp->dev = 1; /* TODO: add support for PCMCIA flash */
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fp->private = (void *)ent;
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fp->file_len = ent->length;
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fp->file_pos = 0;
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/* copy the filename */
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strncpy(fp->filename, ent->filename, 48);
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fp->code = 1;
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}
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/**
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* Read data from a given file
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* @param pbuf Buffer to read data into
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* @param size size of entity to be read
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* @param nmemb number of members to read
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* @param fp file information structure to read from.
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* @returns number of bytes read (should = size * nmemb for C3600)
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*/
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uint32_t platio_read(void *pbuf, uint32_t size, uint32_t nmemb, struct file *fp)
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{
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/* calculate the effective offset of the data we want to read: */
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char *from = (char *)((uint32_t)(fp->private) + sizeof(struct fs_ent) +
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fp->file_pos);
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memcpy(pbuf, from, size * nmemb);
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fp->file_pos += size * nmemb;
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return nmemb * size;
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}
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/**
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* low-level prom and I/O library for the Cisco 2600 series
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* (C) 2008 Philippe Vachon <philippe@cowpig.ca>
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* -----------------------------------------------------------
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* Licensed under the GNU General Public License v2.0. See
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* COPYING in the root directory of the source distribution for details.
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*/
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#include <promlib.h>
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#include <types.h>
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#include <asm/ppc_asm.h>
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#define UART_BASE 0xffe00000
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#define UART_LSR 0x5
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/* putc
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* output character c to console
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* @param c ASCII number for character
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*/
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void c_putc(const char c)
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{
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while (!(*((char *)(UART_BASE + UART_LSR)) & 0x20));
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((char *)UART_BASE)[0] = c;
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}
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/* puts - wrapper for putc
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* output the string pointed to by s
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* @param s String to be written to the console
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*/
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void c_puts(const char *s)
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{
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while(*s != '\0') {
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c_putc(*(s++));
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if (*s == '\n') {
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c_putc('\r');
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}
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}
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}
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/* putsn - put a string of length n on the console
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* @param s string to be written
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* @param n length
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*/
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void c_putsn(const char *s, int n)
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{
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int i = 0;
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while (*s != '\0' && i != n) {
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c_putc(*(s++));
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i++;
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}
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}
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/* getc - Syscall n
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* get one character of input from the console
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* @return ASCII code for character read from console
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*/
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char c_getc(void)
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{
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char c;
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while (!(*((uint8_t *)(UART_BASE + UART_LSR)) & 0x01));
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c = ((uint8_t *)UART_BASE)[0];
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return c;
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}
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/* gets - wrapper for getc
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* reads up to n characters into buffer b
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* @param b Buffer to read characters into
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* @param n size of buffer
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* @return the number of characters read into b
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*/
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int c_gets(char *b, int n)
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{
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int i = 0;
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do {
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b[i] = c_getc();
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c_putc(b[i]);
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i++;
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if (b[i - 1] == '\n' || b[i-1] == '\r') {
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break;
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}
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else if (b[i - 1] == 0x8 || b[i - 1] == 0x7f) {
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i-=2;
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}
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} while (i < n);
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b[i - 1] = '\0';
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return i;
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}
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/* c_version - get version string
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* @return pointer to version string
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*/
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char *c_verstr(void)
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{
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return "Cisco 2600 Series Router";
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}
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/* memsz - get total memory size (in bytes)
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* @return the size of the memory installed in the router, in bytes
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*/
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int c_memsz(void)
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{
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int m = 0;
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__asm__ (
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"li 3, 4\n"
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"sc\n"
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"mr %[memsz], 3\n"
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: [memsz]"=r"(m)
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: /* no inputs */
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: "r3","memory","cc"
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);
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return m;
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}
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/* timer - get number of ticks from timer
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* @return the value in the timer
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*/
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long c_timer(void)
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{
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return 0;
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}
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/* String length with a maximum length allowed
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* @param s pointer to string
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* @param maxlen maximum length
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*/
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int c_strnlen(const char *s, int maxlen)
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{
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int i = 0;
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if (!s) return 0;
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while (*(s++) != '\0' && i != maxlen) {
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i++;
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}
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return i;
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}
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/* baud - get console baud rate
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* @return boot console baud rate
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*/
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int c_baud(void)
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{
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int b = 115200;
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__asm__ (
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"li 3, 62\n"
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"sc\n"
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"mr %[baud], 3\n"
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: [baud]"=r"(b)
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: /* no returns */
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: "r3", "memory", "cc"
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);
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return b;
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}
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@ -0,0 +1,29 @@
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/* CILO entry point for the Cisco 2600 Series Routers
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* (C) 2009 Philippe Vachon <philippe@cowpig.ca>
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* Licensed under the GNU General Public License v2.0 or later. See
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* COPYING in the root of the source distribution for more details.
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*/
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#include <asm/ppc_asm.h>
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.text
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.globl _start
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_start:
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/* put a letter C to show we are alive */
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lis r26, 0xffe0
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putchar:
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lbz r0, 5(r26)
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andi. r0, r0, 0x20
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beq putchar
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/* put the C */
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li r3, 67
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stb r3, 0(r26)
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/* jump to the C code */
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bl start_bootloader
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.end _start
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.size _start, .-_start
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@ -0,0 +1,28 @@
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OUTPUT_ARCH(mips)
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ENTRY(_start)
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EXTERN(_start)
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SECTIONS
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{
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.text :
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{
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. = ALIGN(4096);
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*(.reginfo)
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*(.text)
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*(.rodata*)
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*(.data*)
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*(.sdata*)
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*(.got2)
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*(.bss)
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*(.sbss)
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*(.pdr)
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}
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/DISCARD/ :
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{
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*(.comment)
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*(.note.GNU-stack)
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*(.gnu.attributes)
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}
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}
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@ -0,0 +1,30 @@
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OUTPUT_ARCH(powerpc:common)
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ENTRY(_start)
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EXTERN(_start)
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PHDRS
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{
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text PT_LOAD FILEHDR PHDRS ;
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}
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SECTIONS
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{
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.text :
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{
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. = ALIGN(4096);
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*(.text)
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*(.rodata*)
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*(.data*)
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*(.sdata*)
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*(.got2)
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*(.bss)
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*(.sbss)
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} :text
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/DISCARD/ :
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{
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*(.comment)
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*(.note.GNU-stack)
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*(.gnu.attributes)
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}
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}
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