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-sun4: Miscellaneous DMA fixes, nw

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This commit is contained in:
mooglyguy 2018-09-10 18:07:45 +02:00
parent aa2dadb099
commit 6465de84d3
2 changed files with 19 additions and 13 deletions
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4
src/devices/machine/am79c90.cpp
View File

@ -378,7 +378,7 @@ void am79c90_device::poll_transmit()
{
ring_descriptor &curr = m_curr_transmit_desc;
const uint32_t base_addr = (m_transmit_ring_addr >> 2) + (m_transmit_ring_pos << 1);
logerror("%s: LANCE polling for packets from %08x\n", machine().describe_context(), base_addr);
//logerror("%s: LANCE polling for packets from %08x\n", machine().describe_context(), base_addr);
curr.m_tmd01 = m_dma_in_cb(base_addr, ~0);
const uint16_t tmd1 = (uint16_t)curr.m_tmd01;
@ -395,7 +395,7 @@ void am79c90_device::poll_transmit()
return;
}
logerror("%s: LANCE: Starting transmitting\n", machine().describe_context());
//logerror("%s: LANCE: Starting transmitting\n", machine().describe_context());
m_transmit_poll_timer->adjust(attotime::never);
m_transmitting = true;

28
src/mame/drivers/sun4.cpp
View File

@ -636,6 +636,7 @@ private:
uint32_t m_buserr[4];
uint32_t m_counter[4];
uint32_t m_dma[4];
bool m_dma_irq;
bool m_dma_tc_read;
uint32_t m_dma_pack_register;
int m_scsi_irq;
@ -1371,6 +1372,7 @@ void sun4_state::machine_reset()
m_irq_reg = 0;
m_scc1_int = m_scc2_int = 0;
m_scsi_irq = 0;
m_dma_irq = false;
m_dma_tc_read = false;
m_dma_pack_register = 0;
@ -1496,7 +1498,7 @@ void sun4_state::type1space_map(address_map &map)
map(0x07200000, 0x07200003).rw(FUNC(sun4_state::fdc_r), FUNC(sun4_state::fdc_w));
map(0x08000000, 0x08000003).r(FUNC(sun4_state::ss1_sl0_id)); // slot 0 contains SCSI/DMA/Ethernet
map(0x08400000, 0x0840000f).rw(FUNC(sun4_state::dma_r), FUNC(sun4_state::dma_w));
map(0x08800000, 0x0880001f).m(m_scsi, FUNC(ncr53c90a_device::map)).umask32(0xff000000);
map(0x08800000, 0x0880002f).m(m_scsi, FUNC(ncr53c90a_device::map)).umask32(0xff000000);
map(0x08c00000, 0x08c00003).rw(m_lance, FUNC(am79c90_device::regs_r), FUNC(am79c90_device::regs_w));
map(0x0e000000, 0x0e000003).r(FUNC(sun4_state::ss1_sl3_id)); // slot 3 contains video board
map(0x0e800000, 0x0e8fffff).ram().share("bw2_vram");
@ -1702,13 +1704,12 @@ void sun4_state::dma_check_interrupts()
int irq_or_err_pending = (m_dma[DMA_CTRL] & (DMA_INT_PEND | DMA_ERR_PEND)) ? 1 : 0;
int irq_enabled = (m_dma[DMA_CTRL] & DMA_INT_EN) ? 1 : 0;
if (irq_or_err_pending && irq_enabled)
bool old_irq = m_dma_irq;
m_dma_irq = irq_or_err_pending && irq_enabled;
if (old_irq != m_dma_irq)
{
m_maincpu->set_input_line(SPARC_IRQ3, ASSERT_LINE);
}
else
{
m_maincpu->set_input_line(SPARC_IRQ3, CLEAR_LINE);
logerror("m_dma_irq %d because irq_or_err_pending:%d and irq_enabled:%d\n", m_dma_irq ? 1 : 0, irq_or_err_pending, irq_enabled);
m_maincpu->set_input_line(SPARC_IRQ3, m_dma_irq ? ASSERT_LINE : CLEAR_LINE);
}
}
@ -1726,7 +1727,7 @@ void sun4_state::dma_transfer_write()
logerror("Read from device: %02x, pack count %d\n", dma_value, pack_cnt);
m_dma_pack_register |= dma_value << bit_index;
//if (m_dma[DMA_CTRL] & DMA_EN_CNT)
if (m_dma[DMA_CTRL] & DMA_EN_CNT)
m_dma[DMA_BYTE_COUNT]--;
pack_cnt++;
@ -1785,7 +1786,7 @@ void sun4_state::dma_transfer_read()
word_cached = false;
m_dma[DMA_ADDR]++;
//if (m_dma[DMA_CTRL] & DMA_EN_CNT)
if (m_dma[DMA_CTRL] & DMA_EN_CNT)
m_dma[DMA_BYTE_COUNT]--;
}
}
@ -1882,8 +1883,13 @@ WRITE32_MEMBER( sun4_state::dma_w )
WRITE_LINE_MEMBER( sun4_state::scsi_irq )
{
int old_irq = m_scsi_irq;
m_scsi_irq = state;
dma_check_interrupts();
if (m_scsi_irq != old_irq)
{
logerror("scsi_irq %d, checking interrupts\n", state);
dma_check_interrupts();
}
}
WRITE_LINE_MEMBER( sun4_state::scsi_drq )
@ -1894,7 +1900,7 @@ WRITE_LINE_MEMBER( sun4_state::scsi_drq )
{
logerror("scsi_drq, DMA pending\n");
m_dma[DMA_CTRL] |= DMA_REQ_PEND;
if (m_dma[DMA_CTRL] & DMA_EN_DMA && m_dma[DMA_BYTE_COUNT])
if (m_dma[DMA_CTRL] & DMA_EN_DMA/* && m_dma[DMA_BYTE_COUNT]*/)
{
logerror("DMA enabled, starting dma\n");
dma_transfer();