diff options
Diffstat (limited to 'src/devices/cpu/sharc/sharc.cpp')
-rw-r--r-- | src/devices/cpu/sharc/sharc.cpp | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/src/devices/cpu/sharc/sharc.cpp b/src/devices/cpu/sharc/sharc.cpp index ded941af415..391520f688b 100644 --- a/src/devices/cpu/sharc/sharc.cpp +++ b/src/devices/cpu/sharc/sharc.cpp @@ -343,7 +343,10 @@ void adsp21062_device::iop_w(offs_t offset, uint32_t data) case 0x1c: { m_core->dma[6].control = data; - sharc_iop_delayed_w(0x1c, data, 1); + if (data & 0x1) + { + sharc_iop_delayed_w(0x1c, data, 1); + } break; } @@ -360,9 +363,12 @@ void adsp21062_device::iop_w(offs_t offset, uint32_t data) // DMA 7 case 0x1d: - { + { m_core->dma[7].control = data; - sharc_iop_delayed_w(0x1d, data, 30); + if (data & 0x1) + { + sharc_iop_delayed_w(0x1d, data, 30); + } break; } @@ -442,7 +448,7 @@ void adsp21062_device::external_dma_write(uint32_t address, uint64_t data) All addresses in the 17-bit index registers are offset by 0x0002 0000, the first internal RAM location, before they are used by the DMA controller. */ - + switch ((m_core->dma[6].control >> 6) & 0x3) { case 2: // 16/48 packing @@ -972,6 +978,11 @@ void adsp21062_device::set_flag_input(int flag_num, int state) } } +WRITE_LINE_MEMBER(adsp21062_device::write_stall) +{ + m_core->write_stalled = (state == 0) ? false : true; +} + void adsp21062_device::check_interrupts() { int i; @@ -1028,8 +1039,24 @@ void adsp21062_device::execute_run() } else { + if (m_core->write_stalled) + eat_cycles(m_core->icount); + if (m_core->idle && m_core->irq_pending == 0) { + int dma_count = m_core->icount; + + // run active DMAs even while idling + while (dma_count > 0 && m_core->dma_status & ((1 << 6) | (1 << 7))) + { + if (!m_core->write_stalled) + { + dma_run_cycle(6); + dma_run_cycle(7); + } + dma_count--; + } + m_core->icount = 0; debugger_instruction_hook(m_core->daddr); } @@ -1037,9 +1064,9 @@ void adsp21062_device::execute_run() { check_interrupts(); m_core->idle = 0; - } + } - while (m_core->icount > 0 && !m_core->idle) + while (m_core->icount > 0 && !m_core->idle && !m_core->write_stalled) { m_core->pc = m_core->daddr; m_core->daddr = m_core->faddr; @@ -1126,6 +1153,12 @@ void adsp21062_device::execute_run() } } + if (!m_core->write_stalled) + { + dma_run_cycle(6); + dma_run_cycle(7); + } + --m_core->icount; }; } |