diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/sc520/raminit.c | 109 |
1 files changed, 106 insertions, 3 deletions
diff --git a/src/cpu/amd/sc520/raminit.c b/src/cpu/amd/sc520/raminit.c index c04d9e98ce..aecf2b7723 100644 --- a/src/cpu/amd/sc520/raminit.c +++ b/src/cpu/amd/sc520/raminit.c @@ -48,6 +48,90 @@ #define OUTC(addr, val) *(unsigned char *)(addr) = (val) +void p4(unsigned char c){ + //print_err("TRY A TX NIBLE\r\n"); + __console_tx_nibble(c); + return; + print_err("now do the other\r\n"); + + // c = c + '0'; + // if (c > '9') + // c = c + 39; + // __console_tx_byte(c); + //print_err("NO!\r\n"); + // return; + switch(c) { + case 0: + print_err("0"); + break; + case 1: + print_err("1"); + break; + case 2: + print_err("2"); + break; + case 3: + print_err("3"); + break; + case 4: + print_err("4"); + break; + case 5: + print_err("5"); + break; + case 6: + print_err("6"); + break; + case 7: + print_err("7"); + break; + case 8: + print_err("8"); + break; + case 9: + print_err("9"); + break; + case 0xa: + print_err("a"); + break; + case 0xb: + print_err("b"); + break; + case 0xc: + print_err("c"); + break; + case 0xd: + print_err("d"); + break; + case 0xe: + print_err("e"); + break; + case 0xf: + print_err("f"); + break; + } + +} + +void p8(unsigned char c) { + /* + __console_tx_nibble(c>>4); + __console_tx_nibble(c&0xf); + */ + p4(c>>4); + p4(c&0xf); +} + +void p16(unsigned short s) { + p8(s>>16); + p8(s); +} + +void p32(unsigned long l) { + p16(l>>16); + p16(l); +} + /* sadly, romcc can't quite handle what we want, so we do this ugly thing */ #define drcctl (( volatile unsigned char *)0xfffef010) @@ -143,6 +227,7 @@ setupsc520(void){ *cp = 4; /* uart 1 clock source */ cp = (unsigned char *)0xfffefcc4; *cp = 4; /* uart 2 clock source */ +#if 0 /*; set the interrupt mapping registers.*/ cp = (unsigned char *)0x0fffefd20; *cp = 0x01; @@ -172,7 +257,9 @@ setupsc520(void){ outl(0x0cf8,0x080000004); /*index the status command register on device 0*/ outl(0xcfc, 0x2); /*set the memory access enable bit*/ OUTC(0x0fffef072, 1); /* enable req bits in SYSARBMENB */ +#endif +#if 0 /* set up the PAR registers as they are on the MSM586SEG */ @@ -194,7 +281,7 @@ setupsc520(void){ *par++ = 0x545c00c8; /*PAR14: GP BUS MEM:CS5:Base 0xc8, size 0x5c:*/ // *par++ = 0x8a020200; /*PAR15: BOOTCS:code:nocache:write:Base 0x2000000, size 0x80000:*/ - +#endif } @@ -285,6 +372,8 @@ int sizemem(void) /* setup loop to do 4 external banks starting with bank 3 */ *drcbendadr=0x0ff000000; + *drcbendadr=0x0ff; + /* issue a NOP to all DRAMs */ /* Setup DRAM control register with Disable refresh, * disable write buffer Test Mode and NOP command select @@ -341,10 +430,15 @@ int sizemem(void) print_err("\r\n"); // continue; } + *drcctl = 2; + dummy_write(); + *drccfg = *drccfg >> 4; l = *drcbendadr; l >>= 8; *drcbendadr = l; print_err("loop around\r\n"); + *drcctl = 0; + dummy_write(); } #if 0 /* enable last bank and setup ending address @@ -588,7 +682,7 @@ bad_ram: /* this does now work worth shit. */ int staticmem(void){ - volatile unsigned char *zero = (unsigned char *) 0; + volatile unsigned long *zero = (unsigned long *) CACHELINESZ; /* set up 0x18 .. **/ *drcbendadr = 0x88; *drcmctl = 0x1e; @@ -615,9 +709,18 @@ staticmem(void){ print_err("DONE the load mode reg\r\n"); /* normal mode */ + *drcctl = 0x0; + *zero = 0; + print_err("DONE one last write and then turn on refresh etc\n"); *drcctl = 0x18; *zero = 0; print_err("DONE the normal\r\n"); *zero = 0xdeadbeef; - print_err(" zero is now "); print_err_hex32(*zero); print_err("\r\n"); + if (*zero != 0xdeadbeef) + print_err("NO LUCK\r\n"); + else + print_err("did a stor and load ...\r\n"); + // p32(*zero); + print_err_hex32(*zero); + // print_err(" zero is now "); print_err_hex32(*zero); print_err("\r\n"); } |