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ALi M6117 DRAM sizing implementation.

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This commit is contained in:
OBattler
2022-07-18 23:36:11 +02:00
parent 8575947a57
commit 52f8d68fb0
1 changed files with 106 additions and 1 deletions
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107
src/chipset/ali6117.c
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@@ -41,12 +41,49 @@ typedef struct ali6117_t
uint32_t local;
/* Main registers (port 22h/23h) */
uint8_t unlocked;
uint8_t unlocked, mode;
uint8_t reg_offset;
uint8_t regs[256];
} ali6117_t;
/* Total size, Bank 0 size, Bank 1 size, Bank 2 size, Bank 3 size. */
static uint32_t ali6117_modes[32][5] = {
{ 1024, 512, 512, 0, 0 },
{ 2048, 512, 512, 512, 512 },
{ 3072, 512, 512, 2048, 0 },
{ 5120, 512, 512, 2048, 2048 },
{ 9216, 512, 512, 8192, 0 },
{ 1024, 1024, 0, 0, 0 },
{ 2048, 1024, 1024, 0, 0 },
{ 4096, 1024, 1024, 2048, 0 },
{ 6144, 1024, 1024, 2048, 2048 },
{ 10240, 1024, 1024, 8192, 0 },
{ 18432, 1024, 1024, 8192, 8192 },
{ 3072, 1024, 2048, 0, 0 },
{ 5120, 1024, 2048, 2048, 0 },
{ 9216, 1024, 8192, 0, 0 },
{ 2048, 2048, 0, 0, 0 },
{ 4096, 2048, 2048, 0, 0 },
{ 6144, 2048, 2048, 2048, 0 },
{ 8192, 2048, 2048, 2048, 2048 },
{ 12288, 2048, 2048, 8192, 0 },
{ 20480, 2048, 2048, 8192, 8192 },
{ 10240, 2048, 8192, 0, 0 },
{ 18432, 2048, 8192, 8192, 0 },
{ 26624, 2048, 8192, 8192, 8192 },
{ 4096, 4096, 0, 0, 0 },
{ 8192, 4096, 4096, 0, 0 },
{ 24576, 4096, 4096, 8192, 8192 },
{ 12288, 4096, 8192, 0, 0 },
{ 8192, 8192, 0, 0, 0 },
{ 16384, 8192, 8192, 0, 0 },
{ 24576, 8192, 8192, 8192, 0 },
{ 32768, 8192, 8192, 8192, 8192 },
{ 65536, 32768, 32768, 0, 0 }
};
#ifdef ENABLE_ALI6117_LOG
int ali6117_do_log = ENABLE_ALI6117_LOG;
@@ -113,10 +150,56 @@ ali6117_recalcmapping(ali6117_t *dev)
}
static void
ali6117_bank_recalc(ali6117_t *dev)
{
int i;
uint32_t bank, addr;
for (i = 0x00000000; i < (mem_size << 10); i += 4096) {
if ((i >= 0x000a0000) && (i < 0x00100000))
continue;
if (!is6117 && (i >= 0x00f00000) && (i < 0x01000000))
continue;
if (is6117 && (i >= 0x03f00000) && (i < 0x04000000))
continue;
switch (dev->regs[0x10] & 0xf8) {
case 0xe8:
bank = (i >> 12) & 3;
addr = (i & 0xfff) | ((i >> 14) << 12);
ali6117_log("E8 (%08X): Bank %i, address %08X vs. bank size %08X\n", i, bank, addr, ali6117_modes[dev->mode][bank + 1] * 1024);
if (addr < (ali6117_modes[dev->mode][bank + 1] * 1024))
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
else
mem_set_mem_state_both(i, 4096, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
break;
case 0xf8:
bank = (i >> 12) & 1;
addr = (i & 0xfff) | ((i >> 13) << 12);
ali6117_log("F8 (%08X): Bank %i, address %08X vs. bank size %08X\n", i, bank, addr, ali6117_modes[dev->mode][bank + 1] * 1024);
if (addr < (ali6117_modes[dev->mode][bank + 1] * 1024))
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
else
mem_set_mem_state_both(i, 4096, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
break;
default:
mem_set_mem_state_both(i, 4096, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
break;
}
}
flushmmucache();
}
static void
ali6117_reg_write(uint16_t addr, uint8_t val, void *priv)
{
ali6117_t *dev = (ali6117_t *) priv;
int i;
ali6117_log("ALI6117: reg_write(%04X, %02X)\n", addr, val);
@@ -135,6 +218,14 @@ ali6117_reg_write(uint16_t addr, uint8_t val, void *priv)
case 0x10:
refresh_at_enable = !(val & 0x02) || !!(dev->regs[0x20] & 0x80);
dev->regs[dev->reg_offset] = val;
if (val & 0x04)
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_EXTANY | MEM_WRITE_EXTANY);
else
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
ali6117_bank_recalc(dev);
break;
case 0x12:
@@ -326,6 +417,10 @@ ali6117_reset(void *priv)
cpu_set_isa_speed(7159091);
refresh_at_enable = 1;
/* On-board memory 15-16M is enabled by default. */
mem_set_mem_state_both(0x00f00000, 0x00100000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
ali6117_bank_recalc(dev);
}
@@ -357,6 +452,8 @@ ali6117_close(void *priv)
static void *
ali6117_init(const device_t *info)
{
int i, last_match = 0;
ali6117_log("ALI6117: init()\n");
ali6117_t *dev = (ali6117_t *) malloc(sizeof(ali6117_t));
@@ -367,6 +464,14 @@ ali6117_init(const device_t *info)
device_add(&ide_isa_device);
ali6117_setup(dev);
for (i = 31; i >= 0; i--) {
if ((mem_size >= ali6117_modes[i][0]) && (ali6117_modes[i][0] > last_match)) {
last_match = ali6117_modes[i][0];
dev->mode = i;
}
}
ali6117_reset(dev);
if (!(dev->local & 0x08))