repos/blastem: mem.c annotate

annotate mem.c @ 345:29d2ca563499

Don't sync the 68K clock to the VDP clock unless the 68K had to wait for the VDP. This unfortunately breaks the direct color DMA demos, but should be more correct overall.

author	Mike Pavone <pavone@retrodev.com>
date	Sun, 19 May 2013 13:47:47 -0700
parents	3e7bfde7606e
children	140af5509ce7

rev	line source
14 2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	1 #include <sys/mman.h>
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	2 #include <stddef.h>
18 3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	3 #include <stdint.h>
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	4 #include <stdlib.h>
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	5 #include <unistd.h>
14 2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	6 #include "mem.h"
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	7
18 3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	8 /*
14 2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	9 void * alloc_code(size_t *size)
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	10 {
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	11 size += PAGE_SIZE - (size & (PAGE_SIZE - 1));
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	12 return mmap(NULL, *size, PROT_EXEC \| PROT_READ \| PROT_WRITE, MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	13 }
18 3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	14 */
14 2bdad0f52f42 x86 code gen, initial work on translator Mike Pavone <pavone@retrodev.com> parents: diff changeset	15
18 3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	16 /*
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	17 void * alloc_code(size_t *size)
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	18 {
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	19 char * ret = malloc(*size);
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	20 char * base = (char *)(((intptr_t)ret) & (~(PAGE_SIZE-1)));
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	21 mprotect(base, (ret + *size) - base, PROT_EXEC \| PROT_READ \| PROT_WRITE);
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	22 return ret;
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	23 }
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	24 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	25
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	26 void * alloc_code(size_t *size)
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	27 {
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	28 size += PAGE_SIZE - (size & (PAGE_SIZE - 1));
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	29 void * ret = sbrk(*size);
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	30 if (ret == ((void *)-1)) {
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	31 return NULL;
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	32 }
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	33 mprotect(ret, *size, PROT_EXEC \| PROT_READ \| PROT_WRITE);
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	34 return ret;
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes Mike Pavone <pavone@retrodev.com> parents: 14 diff changeset	35 }

Mercurial > repos > blastem

annotate mem.c @ 345:29d2ca563499