// vim:shiftwidth=2:expandtab
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
typedef unsigned short u16;
typedef unsigned char u8;
-static int memdev;
-static volatile u16 *memregs, *blitter;
+struct uppermem_block {
+ u32 addr; // physical
+ u32 size;
+ void *mem;
+ struct uppermem_block *next;
+};
+
+static struct uppermem_block *upper_mem;
+
+static struct {
+ u32 dstctrl;
+ u32 dstaddr;
+ u32 dststride;
+ u32 srcctrl;
+ u32 srcaddr; //
+ u32 srcstride;
+ u32 srcforcolor;
+ u32 srcbackcolor;
+ u32 patctrl; //
+ u32 patforcolor;
+ u32 patbackcolor;
+ u32 size;
+ u32 ctrl; //
+ u32 run;
+ u32 intc;
+ u32 srcfifo;
+} blitter;
+
+static struct {
+ union {
+ u32 mlc_stl_eadr;
+ struct {
+ u16 mlc_stl_eadrl;
+ u16 mlc_stl_eadrh;
+ };
+ };
+} mmsp2;
+
+static u16 *host_screen;
+static int host_stride;
-static volatile void *translate_addr(u32 a, u32 *mask)
+static void *upper_lookup(u32 addr, u8 **mem_end, int *stride_override)
{
- if ((a & 0xfff00000) == 0x7f000000) {
- *mask = 0xffff;
- return memregs;
+ struct uppermem_block *ub;
+
+ // maybe the screen?
+ if (mmsp2.mlc_stl_eadr <= addr && addr < mmsp2.mlc_stl_eadr + 320*240*2) {
+ host_screen = host_video_flip(); // HACK
+ *mem_end = (u8 *)host_screen + host_stride * 240;
+ *stride_override = host_stride;
+ return (u8 *)host_screen + addr - mmsp2.mlc_stl_eadr;
}
- if ((a & 0xfff00000) == 0x7f100000) {
- *mask = 0xff;
- return blitter;
+
+ for (ub = upper_mem; ub != NULL; ub = ub->next) {
+ if (ub->addr <= addr && addr < ub->addr + ub->size) {
+ *mem_end = (u8 *)ub->mem + ub->size;
+ return (u8 *)ub->mem + addr - ub->addr;
+ }
}
- fprintf(stderr, "bad IO @ %08x\n", a);
- abort();
+
+ return NULL;
}
-static u32 xread8(u32 a)
+static void blitter_do(void)
{
- volatile u8 *mem;
- u32 mask;
+ u8 *dst, *dste, *src, *srce;
+ int w, h, sstrd, dstrd;
+
+ if (blitter.srcaddr == blitter.dstaddr)
+ return; // dummy blit?
+
+ w = blitter.size & 0x7ff;
+ h = (blitter.size >> 16) & 0x7ff;
+ sstrd = blitter.srcstride;
+ dstrd = blitter.dststride;
+
+ dst = upper_lookup(blitter.dstaddr, &dste, &dstrd);
+ src = upper_lookup(blitter.srcaddr, &srce, &sstrd);
+ if (dst == NULL || src == NULL) {
+ printf("blit %08x->%08x %dx%d translated to %p->%p\n",
+ blitter.srcaddr, blitter.dstaddr, w, h, src, dst);
+ return;
+ }
+
+ if (dst + dstrd * h > dste) {
+ printf("blit %08x->%08x %dx%d did not fit dst\n",
+ blitter.srcaddr, blitter.dstaddr, w, h);
+ h = (dste - dst) / dstrd;
+ }
+
+ if (src + sstrd * h > srce) {
+ printf("blit %08x->%08x %dx%d did not fit src\n",
+ blitter.srcaddr, blitter.dstaddr, w, h);
+ h = (srce - src) / sstrd;
+ }
+
+ for (; h > 0; h--, dst += dstrd, src += sstrd)
+ memcpy(dst, src, w * 2);
+}
+
+static u32 xread8(u32 a)
+{
iolog("r8 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[a & mask];
+ return 0;
}
static u32 xread16(u32 a)
{
- volatile u16 *mem;
- u32 mask;
-
- //if ((a & 0xfff00000) == 0x7f100000) { static int a; a ^= ~1; return a & 0xffff; }
+// if ((a & 0xfff00000) == 0x7f100000) { static int a; a ^= ~1; return a & 0xffff; }
iolog("r16 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[(a & mask) / 2];
+ return 0;
}
static u32 xread32(u32 a)
{
- volatile u32 *mem;
- u32 mask;
-
- //if ((a & 0xfff00000) == 0x7f100000) { static int a; a ^= ~1; return a; }
+ u32 d = 0;
+ if ((a & 0xfff00000) == 0x7f100000) {
+ u32 *bl = &blitter.dstctrl;
+ a &= 0xfff;
+ if (a < 0x40)
+ d = bl[a / 4];
+ if (a == 0x34)
+ d = 0; // not busy
+ }
iolog("r32 %08x\n", a);
- mem = translate_addr(a, &mask);
- return mem[(a & mask) / 4];
+ return d;
}
static void xwrite8(u32 a, u32 d)
{
- volatile u8 *mem;
- u32 mask;
-
iolog("w8 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[a & mask] = d;
}
static void xwrite16(u32 a, u32 d)
{
- volatile u16 *mem;
- u32 mask;
-
iolog("w16 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[(a & mask) / 2] = d;
+ if ((a & 0xfff00000) == 0x7f000000) {
+ a &= 0xffff;
+ switch (a) {
+ case 0x2912: mmsp2.mlc_stl_eadrl = d; break;
+ case 0x2914: mmsp2.mlc_stl_eadrh = d; break;
+ }
+ printf("w16 %08x %08x\n", a, d);
+ }
}
static void xwrite32(u32 a, u32 d)
{
- volatile u32 *mem;
- u32 mask;
-
iolog("w32 %08x %08x\n", a, d);
- mem = translate_addr(a, &mask);
- mem[(a & mask) / 4] = d;
+ if ((a & 0xfff00000) == 0x7f000000) {
+ printf("w32 %08x %08x\n", a, d);
+ return;
+ }
+ if ((a & 0xfff00000) == 0x7f100000) {
+ u32 *bl = &blitter.dstctrl;
+ a &= 0xfff;
+ if (a < 0x40)
+ bl[a / 4] = d;
+ if (a == 0x34 && (d & 1))
+ blitter_do();
+ return;
+ }
}
#define BIT_SET(v, b) (v & (1 << (b)))
printf("linkpages @ %p\n", g_linkpage);
init_linkpage();
- memdev = open("/dev/mem", O_RDWR);
- memregs = mmap(NULL, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
- blitter = mmap(NULL, 0x100, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xe0020000);
- //blitter = mmap(NULL, 0x100, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
- printf("mapped %d %p %p\n", memdev, memregs, blitter);
+ // host stuff
+ host_screen = host_video_init(&host_stride);
+ if (host_screen == NULL) {
+ printf("can't alloc screen\n");
+ exit(1);
+ }
+}
+
+int emu_read_gpiodev(void *buf, int count)
+{
+ unsigned int btns;
+
+ if (count < 4) {
+ printf("gpiodev read %d?\n", count);
+ return -1;
+ }
+
+ btns = host_read_btns();
+ memcpy(buf, &btns, 4);
+ return 4;
}
void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
{
+ struct uppermem_block *umem;
char name[32];
int fd;
+ // SoC regs
if ((offset & ~0xffff) == 0xc0000000) {
return mmap((void *)0x7f000000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
+ // blitter
if ((offset & ~0xffff) == 0xe0020000) {
return mmap((void *)0x7f100000, length, PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
}
- // pass through
- if ((offset & 0xfe000000) == 0x02000000)
- return mmap(NULL, length, prot, flags, memdev, offset);
+ // upper mem
+ if ((offset & 0xfe000000) != 0x02000000)
+ printf("unexpected devmem mmap @ %08x\n", offset);
+ // return mmap(NULL, length, prot, flags, memdev, offset);
+
+ umem = calloc(1, sizeof(*umem));
+ if (umem == NULL) {
+ printf("OOM\n");
+ return MAP_FAILED;
+ }
+
+ umem->addr = offset;
+ umem->size = length;
+ umem->mem = mmap(NULL, length, prot, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ if (umem->mem != MAP_FAILED)
+ goto done;
+
+ printf("upper mem @ %08x %d mmap fail, trying backing file\n", offset, length);
sprintf(name, "m%08x", offset);
fd = open(name, O_CREAT|O_RDWR, 0644);
lseek(fd, length - 1, SEEK_SET);
name[0] = 0;
write(fd, name, 1);
- return mmap(NULL, length, prot, MAP_SHARED, fd, 0);
+ umem->mem = mmap(NULL, length, prot, MAP_SHARED, fd, 0);
+ if (umem->mem == MAP_FAILED) {
+ printf("failed, giving up\n");
+ close(fd);
+ free(umem);
+ return MAP_FAILED;
+ }
+
+done:
+ printf("upper mem @ %08x %d\n", offset, length);
+ umem->next = upper_mem;
+ upper_mem = umem;
+ return umem->mem;
}
notaz.gp2x.de / ginge.git / blobdiff