source: rtems/c/src/lib/libbsp/powerpc/mvme2307/nvram/nvram.c @ 19ca797

4.104.114.84.95
Last change on this file since 19ca797 was 19ca797, checked in by Joel Sherrill <joel.sherrill@…>, on 10/04/99 at 20:41:28

Motorola MVME2307 BSP submitted by Jay Kulpinski <jskulpin@…>.
No modifications made.
  • Property mode set to 100644
File size: 628 bytes
Line 
1#include <bsp.h>
2
3#define ram_addr_low  (* (volatile char *) IO_TO_LOCAL(0x0074))
4#define ram_addr_high (* (volatile char *) IO_TO_LOCAL(0x0075))
5#define ram_data      (* (volatile char *) IO_TO_LOCAL(0x0077))
6#define ram_end_addr  0x1ff8
7
8int read_nvram(char *buff, int offset, int len) {
9    int i;
10
11    if (offset < 0 || offset >= ram_end_addr) {
12        return 0;
13    }
14    if (offset + len > ram_end_addr) {
15        len = ram_end_addr - offset;
16    }
17    for (i = 0; i < len; i++) {
18        ram_addr_high = offset >> 8;
19        ram_addr_low  = offset;
20        *buff++ = ram_data;
21        offset++;
22    }
23    return len;
24}
25
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