jens
d74ba76649
Committed on the Free edition of March Hare Software CVSNT Server. Upgrade to CVS Suite for more features and support: http://march-hare.com/cvsnt/ git-svn-id: http://moon:8086/svn/vhdl/trunk@319 cc03376c-175c-47c8-b038-4cd826a8556b
361 lines
6.0 KiB
C
361 lines
6.0 KiB
C
#include "libsys_boot.h"
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#include "cfiflash.h"
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typedef struct _ssrec_t
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{
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UINT32 addr;
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UINT32 size;
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UINT32 type;
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UINT8 *data;
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} srec_t;
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typedef struct _sflash_img_hdr_t
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{
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UINT8 magic[4];
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UINT32 target_addr;
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UINT32 img_offset;
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UINT32 img_size;
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UINT32 hdr_next;
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UINT8 img_name[128];
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UINT8 res[108];
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} flash_img_hdr_t;
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enum srec_type
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{
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srec_err, srec_sob, srec_data, srec_rec, srec_eob
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};
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UINT8 h2i(UINT8 *c)
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{
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int i;
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UINT8 t, b = 0;
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for (i=0; i < 2; i++)
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{
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t = c[i];
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if (t >= 'A')
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t = t - 'A' + 10;
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else
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t -= '0';
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b = (b << 4) | t;
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}
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return b;
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}
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int decode_srec(srec_t *pRec, UINT8 *pBuf, int buflen)
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{
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UINT8 chksum, byte;
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int alen, i;
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if (!buflen)
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return srec_err;
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pRec->type = srec_rec;
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alen = 0;
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if ((pBuf[1] > '0') && (pBuf[1] < '4'))
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{
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alen = pBuf[1] - '0' + 1;
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pRec->type = srec_data;
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}
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else if ((pBuf[1] >= '7') && (pBuf[1] <= '9'))
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{
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alen = 11 - (pBuf[1] - '0');
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pRec->type = srec_eob;
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}
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else if (pBuf[1] == '0')
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{
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alen = 2;
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pRec->type = srec_sob;
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}
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byte = h2i(&pBuf[2]);
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pRec->size = byte;
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chksum = byte;
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pRec->addr = 0;
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for (i=0; i < alen; i++)
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{
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byte = h2i(&pBuf[4+2*i]);
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pRec->addr = pRec->addr << 8 | byte;
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chksum += byte;
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}
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pRec->size -= (alen+1);
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pRec->data = (UINT8*) &pBuf[4 + 2*alen];
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for (i=0; i < (int)pRec->size; i++)
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{
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byte = h2i(&pRec->data[2*i]);
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pRec->data[i] = byte;
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chksum += byte;
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}
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chksum = ~chksum;
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byte = h2i(&pRec->data[2*i]);
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if (chksum != byte)
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return 0;
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return pRec->type;
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}
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int srec_getline(UINT8 *pLine)
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{
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char c;
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int i = 0;
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do
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{
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c = readchar();
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} while ((c != 's') && (c != 'S'));
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while(((c != 0x0D) && (c != 0x0A)))
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{
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pLine[i++] = c;
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c = readchar();
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};
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return i;
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}
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void Jump_to(void *pEntry)
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{
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__asm
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(
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".set noreorder\n"
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);
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__asm
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(
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"jr %[pEntry]\n" // jump entry
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:
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: [pEntry] "r" (pEntry)
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);
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__asm
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(
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"nop\n"
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);
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__asm
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(
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".set reorder\n"
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);
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}
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void Exec_at(void *pEntry)
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{
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__asm
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(
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".set noreorder\n"
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);
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__asm
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(
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"mfc0 $26, $12\n" // change exception vector
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"li $27, 0xFFBFFFFF\n"
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"and $26, $27\n"
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"mtc0 $26, $12\n"
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);
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__asm
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(
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"jr %[pEntry]\n" // jump entry
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:
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: [pEntry] "r" (pEntry)
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);
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__asm
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(
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"rfe\n"
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);
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__asm
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(
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".set reorder\n"
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);
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}
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void PrintCPUinfo(void)
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{
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int result, rev_id;
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char *cpu_type_str[7] = {"invalid", "R2000", "R3000", "R6000", "R4000", "reserved", "R6000A"};
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// Print Status register
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result = CP0_SR_read();
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sputs("Status : ");
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print_word(result);
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sputs("\n");
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// Print Revision
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result = CP0_PRID_read();
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rev_id = (result >> 8) & 0xFF;
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sputs("CPU type: ");
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if ((rev_id > 0) && (rev_id < 0x07))
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{
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sputs(cpu_type_str[rev_id]);
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sputs(" Rev.");
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rev_id = result & 0xFF;
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print_byte((char)rev_id);
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}
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else
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sputs("Unknown");
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sputs("\n");
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}
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#define MAX_IMG_SIZE (1024*1024) // bytes
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#define SDRAM_BASE 0x40000000
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#define FLASH_OFFSET 0x00000000
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int main(int argc, char *argv[])
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{
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UINT8 buf[256];
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srec_t srec;
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int result, srec_state, i;
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UINT32 haddr;
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flash_t flash;
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flash_img_hdr_t img_hdr = {0};
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flash_img_hdr_t *pImg_hdr;
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UINT32 img_size;
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volatile UINT32 *pReg = (UINT32*)sys_led_port;
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volatile UINT32 *pBtn = (UINT32*)sys_gpio0;
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volatile UINT8 *pMem;
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volatile UINT32 *pROM32;
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volatile UINT32 *pMem32;
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volatile UINT32 *pFlash = (UINT32*)sys_flash_io;
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volatile UINT32 *pUSB = (UINT32*)sys_usb_data;
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volatile UINT8 *ram8 = (UINT8*)SDRAM_BASE;
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volatile UINT16 *ram16 = (UINT16*)SDRAM_BASE;
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volatile UINT32 *ram32 = (UINT32*)SDRAM_BASE;
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*pReg = 0;
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haddr = 0;
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// ----------------------------------------------------------
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ram32 = (UINT32*)(SDRAM_BASE);
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pFlash = (UINT32*)(sys_flash_io + FLASH_OFFSET);
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if (!*pBtn)
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{
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sputs("\n\n");
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sputs("Booting from flash...");
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pImg_hdr = (flash_img_hdr_t*)pFlash;
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ram32 = (UINT32*)pImg_hdr->target_addr;
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pFlash = (UINT32*)(sys_flash_io + pImg_hdr->img_offset);
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img_size = pImg_hdr->img_size;
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for (i=0; i < img_size/4; i++)
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ram32[i] = pFlash[i];
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sputs("done\n\n");
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Exec_at((void*)ram32);
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}
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else
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{
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if (flash_find(&flash, sys_flash_io) < 0)
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{
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sputs("Cannot find flash device. Exit now!\n\n");
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return 1;
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}
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// Erase SDRAM
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for (i=0; i < MAX_IMG_SIZE/4; i++)
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ram32[i] = 0;
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sputs("\n\n");
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sputs("Booting from UART..");
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while(1)
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{
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sputs(".");
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while(1)
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{
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result = srec_getline(buf);
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srec_state = decode_srec(&srec, buf, result);
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*pReg = 0;
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switch (srec_state)
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{
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case srec_data:
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if ((srec.addr + srec.size) > haddr)
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haddr = srec.addr + srec.size;
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pMem = (UINT8*)srec.addr;
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for (i=0; i < srec.size; i++)
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*pMem++ = srec.data[i];
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break;
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case srec_eob:
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sputs("done\n\n");
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img_hdr.magic[0] = 'J';
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img_hdr.magic[1] = 'F';
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img_hdr.magic[2] = 'I';
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img_hdr.magic[3] = '1';
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img_hdr.target_addr = srec.addr;
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img_hdr.img_size = haddr - srec.addr;
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img_hdr.img_offset = FLASH_OFFSET + sizeof(flash_img_hdr_t);
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img_hdr.hdr_next = FLASH_OFFSET;
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sputs("Flash erase...");
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result = flash_erase(&flash, FLASH_OFFSET, img_hdr.img_size + sizeof(flash_img_hdr_t));
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if (result < 0)
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{
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sputs("failed!\n");
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break;
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}
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sputs("done\n");
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sputs("Flash write...");
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result = flash_program(&flash, FLASH_OFFSET, (UINT8*)&img_hdr, sizeof(flash_img_hdr_t));
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if (result < 0)
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{
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sputs("failed!\n");
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break;
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}
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result = flash_program(&flash, img_hdr.img_offset, (UINT8*)ram32, img_hdr.img_size);
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if (result < 0)
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{
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sputs("failed!\n");
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break;
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}
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sputs("done\n");
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sputs("Flash verify...");
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result = flash_verify(&flash, img_hdr.img_offset, (UINT8*)ram32, img_hdr.img_size);
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if (result < 0)
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{
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sputs("failed!\n");
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break;
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}
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sputs("passed\n");
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Jump_to((void*)0xBFC00000);
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// sputs("\nPush reset button to boot!\n");
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// *pReg = 1;
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break;
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default:
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result = -1;
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break;
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}
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if (result < 0)
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{
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*pReg = 0x40000000;
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break;
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}
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};
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}
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}
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return 0;
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}
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