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Line 24... |
#include "arch.h"
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#include "arch.h"
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#include "sprs.h"
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#include "sprs.h"
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extern int cont_run; /* defined in toplevel.c */
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extern int cont_run; /* defined in toplevel.c */
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extern int tt_stopped; /* defined in tick.c */
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extern int tt_stopped; /* defined in tick.c */
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extern int GlobalMode; /* CZ 21/06/01 */
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static sprword sprs[MAX_SPRS];
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static sprword sprs[MAX_SPRS];
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int temp_disable_except = 0;
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int temp_disable_except = 0;
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int audio_cnt = 0;
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int audio_cnt = 0;
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| Line 64... |
Line 65... |
break;
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break;
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case 0x1234:
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case 0x1234:
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printf("MTSPR(0x1234, %x);\n", value);
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printf("MTSPR(0x1234, %x);\n", value);
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break;
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break;
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}
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}
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/* What the hell is happening here? This looks like a bug
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waiting to happen. Assume regno = 2*MAX_SPRS_PER_GRP+3,
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which presumably means I want to set register 3 in
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group 2. Instead, I calculate ofs as 3, and regno as
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2, and get a final value of 5??? Is this correct?
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Oh well...I didn't write this. Who knows what it is
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actually supposed to do. It doesn't matter if regno
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is less than MAX_SPRS_PER_GRP, which is the only
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way I use it. CZ - 21/06/01
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*/
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regno /= MAX_SPRS_PER_GRP;
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regno /= MAX_SPRS_PER_GRP;
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regno += ofs;
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regno += ofs;
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/* CZ 21/06/01 ... the debugger wants to do this! */
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if(GlobalMode)
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{
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extern unsigned long pc;
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if(regno == SPR_PC)
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{
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sprs[SPR_PC] = value;
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#if 0
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/* There is currently a problem with symbol tables by
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gdb. It doesn't properly set up the CPU. We'll ignore
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this for now. */
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pc = value;
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pc_phy = simulate_ic_mmu_fetch(pc);
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pcnext = pc+4;
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#endif
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return;
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}
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}
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/* printf("mtspr(%x, %x)\n", regno, value);
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/* printf("mtspr(%x, %x)\n", regno, value);
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*/ if (regno < MAX_SPRS)
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*/ if (regno < MAX_SPRS)
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sprs[regno] = value;
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sprs[regno] = value;
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else {
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else {
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printf("\nABORT: write out of SPR range\n");
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printf("\nABORT: write out of SPR range\n");
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Line 117... |
int ofs = regno % MAX_SPRS_PER_GRP;
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int ofs = regno % MAX_SPRS_PER_GRP;
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regno /= MAX_SPRS_PER_GRP;
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regno /= MAX_SPRS_PER_GRP;
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regno += ofs;
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regno += ofs;
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/* CZ 21/06/01 ... the debugger wants to do this! */
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if(GlobalMode)
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{
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extern unsigned long pc;
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if(regno == SPR_PC)
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return pc;
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}
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/* MM: l.rfe, for example, temporarly disables
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/* MM: l.rfe, for example, temporarly disables
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exceptions. We will make it appear as SR bit
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exceptions. We will make it appear as SR bit
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is set. */
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is set. */
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if (regno == SPR_SR && temp_disable_except > 0)
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if (regno == SPR_SR && temp_disable_except > 0)
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return sprs[regno] | SPR_SR_EXR;
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return sprs[regno] | SPR_SR_EXR;
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