diff options
Diffstat (limited to 'sys/arch/mvme88k/stand/bugcrt/crt.c')
| -rw-r--r-- | sys/arch/mvme88k/stand/bugcrt/crt.c | 139 |
1 files changed, 48 insertions, 91 deletions
diff --git a/sys/arch/mvme88k/stand/bugcrt/crt.c b/sys/arch/mvme88k/stand/bugcrt/crt.c index 73f0ad09837..150be1abed2 100644 --- a/sys/arch/mvme88k/stand/bugcrt/crt.c +++ b/sys/arch/mvme88k/stand/bugcrt/crt.c @@ -1,91 +1,62 @@ -/* $OpenBSD: crt.c,v 1.5 2003/10/02 13:24:39 miod Exp $ */ +/* $OpenBSD: crt.c,v 1.6 2006/05/16 22:51:30 miod Exp $ */ #include <sys/types.h> #include <machine/prom.h> -struct mvmeprom_args bugargs = { 1 }; /* not BSS */ +#include "stand.h" +#include "libbug.h" -asm (".text"); -/* pseudo reset vector */ -asm (STACK_ASM_OP); /* initial sp value */ -asm (".long _start"); /* initial ip value */ +struct mvmeprom_args bugargs; + +__asm__ (".text"); +__asm__ (STACK_ASM_OP); /* initial sp value */ +__asm__ (".long _start"); /* initial ip value */ + +extern void main(void); void -start() +start(u_int dev_lun, u_int ctrl_lun, u_int flags, u_int ctrl_addr, u_int entry, + u_int conf_blk, char *arg_start, char *arg_end) { - extern int edata, end; - struct mvmeprom_brdid *id, *mvmeprom_brdid(); + extern u_int edata, end; + char *nbarg_start; + char *nbarg_end; + u_int dummy; - /* - * This code enables the SFU1 and is used for single stage - * bootstraps or the first stage of a two stage bootstrap. - * Do not use r10 to enable the SFU1. This wipes out - * the netboot args. Not cool at all... r25 seems free. + /* + * Save r10 and r11 first. We can't put declare them as arguments + * since the normal calling convention would put them on the stack. */ - asm("| enable SFU1"); - asm(" ldcr r25,cr1" ::: "r25"); - asm(" clr r25,r25,1<3>"); /* bit 3 is SFU1D */ - asm(" stcr r25,cr1"); - - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_DEVLUN : - "=r" (bugargs.dev_lun)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_CTRLLUN : - "=r" (bugargs.ctrl_lun)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_FLAGS : - "=r" (bugargs.flags)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_CTRLADDR : - "=r" (bugargs.ctrl_addr)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_ENTRY : - "=r" (bugargs.entry)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_CONFBLK : - "=r" (bugargs.conf_blk)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_ARGSTART : - "=r" (bugargs.arg_start)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_ARGEND : - "=r" (bugargs.arg_end)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_NBARGSTART : - "=r" (bugargs.nbarg_start)); - __asm__ __volatile__ ("or %0, r0, " MVMEPROM_REG_NBARGEND : - "=r" (bugargs.nbarg_end)); - *bugargs.arg_end = 0; + __asm__ __volatile__ ("or %0, r0, r10" : "=r" (nbarg_start) : : + "r10", "r11"); + __asm__ __volatile__ ("or %0, r0, r11" : "=r" (nbarg_end) : : + "r10", "r11"); - id = mvmeprom_brdid(); - bugargs.cputyp = id->model; - -#ifdef notyet /* STAGE1 */ - /* - * Initialize PSR and CMMU to a known, stable state. - * This has to be done early for MVME197. - * Per EB162 mc88110 engineering bulletin. + /* + * This code enables the SFU1 and is used for single stage + * bootstraps or the first stage of a two stage bootstrap. + * Do not use lower registers to enable the SFU1. This wipes out + * the args. Not cool at all... r25 seems free. */ - if (bugargs.cputyp == 0x197) { - asm("| init MVME197"); - asm("| 1. PSR"); - asm("or.u r2,r0,0xA200"); - asm("or r2,r2,0x03E2"); - asm("stcr r2,cr1"); - asm("| 2. ICTL"); - asm("or r2,r0,r0"); - asm("or r2,r2,0x8000"); - asm("or r2,r2,0x0040"); - asm("stcr r2,cr26"); - asm("| 3. DCTL"); - asm("or r2,r0,r0"); - asm("or r2,r2,0x2000"); - asm("or r2,r2,0x0040"); - asm("stcr r2,cr41"); - asm("| 4. init cache"); - asm("or r2,r0,0x01"); - asm("stcr r2,cr25"); - asm("stcr r2,cr40"); - } -#endif + __asm__ __volatile__ ("ldcr %0, cr1" : "=r" (dummy)); + __asm__ __volatile__ ("clr %0, %0, 1<3>; stcr %0, cr1" : "+r" (dummy)); memset(&edata, 0, ((int)&end - (int)&edata)); - asm ("| main()"); + bugargs.dev_lun = dev_lun; + bugargs.ctrl_lun = ctrl_lun; + bugargs.flags = flags; + bugargs.ctrl_addr = ctrl_addr; + bugargs.entry = entry; + bugargs.conf_blk = conf_blk; + bugargs.arg_start = arg_start; + bugargs.arg_end = arg_end; + bugargs.nbarg_start = nbarg_start; + bugargs.nbarg_end = nbarg_end; + *bugargs.arg_end = '\0'; + main(); - mvmeprom_return(); + _rtt(); /* NOTREACHED */ } @@ -95,27 +66,13 @@ __main() } void -bugexec(void (*addr)(void)) +bugexec(void (*addr)()) { - __asm__ __volatile__ ("or " MVMEPROM_REG_DEVLUN ", r0, %0" :: - "r" (bugargs.dev_lun)); - __asm__ __volatile__ ("or " MVMEPROM_REG_CTRLLUN ", r0, %0" :: - "r" (bugargs.ctrl_lun)); - __asm__ __volatile__ ("or " MVMEPROM_REG_FLAGS ", r0, %0" :: - "r" (bugargs.flags)); - __asm__ __volatile__ ("or " MVMEPROM_REG_CTRLADDR ", r0, %0" :: - "r" (bugargs.ctrl_addr)); - __asm__ __volatile__ ("or " MVMEPROM_REG_ENTRY ", r0, %0" :: - "r" (bugargs.entry)); - __asm__ __volatile__ ("or " MVMEPROM_REG_CONFBLK ", r0, %0" :: - "r" (bugargs.conf_blk)); - __asm__ __volatile__ ("or " MVMEPROM_REG_ARGSTART ", r0, %0" :: - "r" (bugargs.arg_start)); - __asm__ __volatile__ ("or " MVMEPROM_REG_ARGEND ", r0, %0" :: - "r" (bugargs.arg_end)); + (*addr)(bugargs.dev_lun, bugargs.ctrl_lun, bugargs.flags, + bugargs.ctrl_addr, bugargs.entry, bugargs.conf_blk, + bugargs.arg_start, bugargs.arg_end); - (*addr)(); - printf("bugexec: 0x%x returned!\n", addr); + printf("bugexec: %p returned!\n", addr); _rtt(); } |