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Implemented DDMA for the VIA southbridges that support it, closes #1613.

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This commit is contained in:
OBattler
2021-09-02 22:56:51 +02:00
parent e74cd24c17
commit 3268c0299d
1 changed files with 22 additions and 10 deletions
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32
src/chipset/via_pipc.c
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@@ -37,6 +37,7 @@
#include <86box/timer.h>
#include <86box/nvr.h>
#include <86box/acpi.h>
#include <86box/ddma.h>
#include <86box/pci.h>
#include <86box/pic.h>
#include <86box/port_92.h>
@@ -79,6 +80,7 @@ typedef struct
sff8038i_t *bm[2];
nvr_t *nvr;
int nvr_enabled, slot;
ddma_t *ddma;
smbus_piix4_t *smbus;
usb_t *usb[2];
acpi_t *acpi;
@@ -708,6 +710,19 @@ usb_update_io_mapping(pipc_t *dev, int func)
}
static void
pipc_ddma_update(pipc_t *dev, int addr)
{
uint32_t base;
if (dev->local >= VIA_PIPC_8231)
return;
base = (dev->pci_isa_regs[addr] & 0xf0) | (((uint32_t) dev->pci_isa_regs[addr | 0x01]) << 8);
ddma_update_io_mapping(dev->ddma, (addr & 0x0e) >> 1, (dev->pci_isa_regs[addr] & 0xf0), dev->pci_isa_regs[addr | 0x01], (dev->pci_isa_regs[addr] & 0x08) && (base != 0x0000));
}
static void
pipc_write(int func, int addr, uint8_t val, void *priv)
{
@@ -854,19 +869,13 @@ pipc_write(int func, int addr, uint8_t val, void *priv)
case 0x60: case 0x62: case 0x64: case 0x66:
case 0x6a: case 0x6c: case 0x6e:
c = (addr & 0x0e) >> 1;
dma[c].ab = (dma[c].ab & 0xffffff0f) | (val & 0xf0);
dma[c].ac = (dma[c].ac & 0xffffff0f) | (val & 0xf0);
if (val & 0x08)
dma_e |= (1 << c);
else
dma_e &= ~(1 << c);
dev->pci_isa_regs[addr] = val & 0xf8;
pipc_ddma_update(dev, addr);
break;
case 0x61: case 0x63: case 0x65: case 0x67:
case 0x6b: case 0x6d: case 0x6f:
c = (addr & 0x0e) >> 1;
dma[c].ab = (dma[c].ab & 0xffff00ff) | (val << 8);
dma[c].ac = (dma[c].ac & 0xffff00ff) | (val << 8);
dev->pci_isa_regs[addr] = val;
pipc_ddma_update(dev, addr & 0xfe);
break;
case 0x70: case 0x71: case 0x72: case 0x73:
@@ -1353,6 +1362,9 @@ pipc_init(const device_t *info)
pci_enable_mirq(2);
}
if (dev->local < VIA_PIPC_8231)
dev->ddma = device_add(&ddma_device);
if (dev->acpi) {
acpi_set_slot(dev->acpi, dev->slot);
acpi_set_nvr(dev->acpi, dev->nvr);