diff options
Diffstat (limited to 'src/devices/machine/vic_pl192.cpp')
-rw-r--r-- | src/devices/machine/vic_pl192.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/devices/machine/vic_pl192.cpp b/src/devices/machine/vic_pl192.cpp new file mode 100644 index 00000000000..7eda1220987 --- /dev/null +++ b/src/devices/machine/vic_pl192.cpp @@ -0,0 +1,130 @@ +// license:BSD-3-Clause +// copyright-holders:Melissa Goad + +// ARM PrimeCell PL192 VIC emulation + +#include "emu.h" +#include "machine/bankdev.h" +#include "machine/vic_pl192.h" + +#define LOG_GENERAL (1U << 0) + +#define VERBOSE (LOG_GENERAL) +#include "logmacro.h" + +void vic_pl192_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +{ + if(u32 intrs = (raw_intr | soft_intr) & intr_en) + { + if(intrs & intr_select) m_out_fiq_func(1); + else m_out_fiq_func(0); + + if(intrs & ~intr_select) m_out_irq_func(1); + else m_out_irq_func(0); + } +} + +void vic_pl192_device::set_irq_line(int irq, int state) +{ + u32 mask = (1 << irq); + + if(state) + { + raw_intr |= mask; + } + else + { + raw_intr &= ~mask; + } + + timer_set(attotime::zero, TIMER_CHECK_IRQ); +} + +void vic_pl192_device::map(address_map &map) +{ + map(0x000, 0x003).lr32([this](offs_t offset){ return raw_intr & ~intr_select; }, "irq_status"); //IRQ_STATUS + map(0x004, 0x007).lr32([this](offs_t offset){ return raw_intr & intr_select; }, "fiq_status"); //FIQ_STATUS + map(0x008, 0x00b).lr32([this](offs_t offset){ return raw_intr; }, "raw_intr"); + map(0x00c, 0x00f).lrw32(NAME([this](offs_t offset){ return intr_select; }), NAME([this](offs_t offset, u32 data){ intr_select = data; timer_set(attotime::zero, TIMER_CHECK_IRQ); })); + map(0x010, 0x013).lrw32(NAME([this](offs_t offset){ return intr_en; }), NAME([this](offs_t offset, u32 data){ intr_en = data; timer_set(attotime::zero, TIMER_CHECK_IRQ); })); + map(0x014, 0x017).lw32([this](u32 data){ intr_en &= ~data; }, "intr_en_clear"); + map(0x018, 0x01b).lrw32(NAME([this](offs_t offset){ return soft_intr; }), NAME([this](offs_t offset, u32 data){ soft_intr = data; timer_set(attotime::zero, TIMER_CHECK_IRQ); })); + map(0x01c, 0x01f).lw32([this](u32 data){ soft_intr &= ~data; }, "soft_intr_clear"); + map(0x020, 0x020).lrw8(NAME([this](offs_t offset){ return protection; }), NAME([this](offs_t offset, u8 data){ protection = data & 1; })).umask32(0x000000ff); + map(0x024, 0x025).lrw8(NAME([this](offs_t offset){ return sw_priority_mask; }), NAME([this](offs_t offset, u16 data){ sw_priority_mask = data; })).umask32(0x0000ffff); + map(0x028, 0x028).lrw8(NAME([this](offs_t offset){ return daisy_priority; }), NAME([this](offs_t offset, u8 data){ daisy_priority = data & 0xf; })).umask32(0x000000ff); + map(0x100, 0x17f).lrw32(NAME([this](offs_t offset){ return vectaddr[(offset & 0x7c) >> 2]; }), NAME([this](offs_t offset, u32 data){ vectaddr[(offset & 0x7c) >> 2] = data; })); + map(0x200, 0x27f).lrw8(NAME([this](offs_t offset){ return vectprio[(offset & 0x7c) >> 2]; }), NAME([this](offs_t offset, u32 data){ vectprio[(offset & 0x7c) >> 2] = data & 0xf; })); + map(0xf00, 0xf03).lrw32(NAME([this](offs_t offset){ return vicaddress; }), NAME([this](offs_t offset, u32 data){ vectaddr[(offset & 0x7c) >> 2] = data; })); + map(0xfe0, 0xfe0).lr8([this](offs_t offset){ return periph_id[0]; }, "periph_id0").umask32(0x000000ff); + map(0xfe4, 0xfe4).lr8([this](offs_t offset){ return periph_id[1]; }, "periph_id1").umask32(0x000000ff); + map(0xfe8, 0xfe8).lr8([this](offs_t offset){ return periph_id[2]; }, "periph_id2").umask32(0x000000ff); + map(0xfec, 0xfec).lr8([this](offs_t offset){ return periph_id[3]; }, "periph_id3").umask32(0x000000ff); + map(0xff0, 0xff0).lr8([this](offs_t offset){ return pcell_id[0]; }, "pcell_id0").umask32(0x000000ff); + map(0xff4, 0xff4).lr8([this](offs_t offset){ return pcell_id[1]; }, "pcell_id1").umask32(0x000000ff); + map(0xff8, 0xff8).lr8([this](offs_t offset){ return pcell_id[2]; }, "pcell_id2").umask32(0x000000ff); + map(0xffc, 0xffc).lr8([this](offs_t offset){ return pcell_id[3]; }, "pcell_id3").umask32(0x000000ff); +} + +device_memory_interface::space_config_vector vic_pl192_device::memory_space_config() const +{ + return space_config_vector{ + std::make_pair(0, &m_mmio_config) + }; +} + +void vic_pl192_device::device_resolve_objects() +{ + // resolve callbacks + m_out_irq_func.resolve_safe(); + m_out_fiq_func.resolve_safe(); +} + +void vic_pl192_device::device_start() +{ + save_item(NAME(raw_intr)); + save_item(NAME(intr_select)); + save_item(NAME(intr_en)); + save_item(NAME(soft_intr)); + save_item(NAME(vectaddr)); + save_item(NAME(vicaddress)); + save_item(NAME(protection)); + save_item(NAME(sw_priority_mask)); + save_item(NAME(daisy_priority)); + save_item(NAME(vectprio)); +} + +void vic_pl192_device::device_reset() +{ + raw_intr = intr_select = intr_en = soft_intr = vicaddress = protection = 0; + sw_priority_mask = 0xffff; + daisy_priority = 0xf; + + for(int i = 0; i < 32; i++) + { + vectaddr[i] = 0; + } + + for(int i = 0; i < 32; i++) + { + vectprio[i] = 0xf; + } +} + +DEFINE_DEVICE_TYPE(PL192_VIC, vic_pl192_device, "vic_pl192", "ARM PL192 VIC") + +vic_pl192_device::vic_pl192_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, type, tag, owner, clock) + , device_memory_interface(mconfig, *this) + , m_mmio_config("mmio", ENDIANNESS_LITTLE, 32, 32, 0) + , m_out_irq_func(*this) + , m_out_fiq_func(*this) + , periph_id{0x92, 0x11, 0x04, 0x00} + , pcell_id{0x0d, 0xf0, 0x05, 0xb1} +{ +} + +vic_pl192_device::vic_pl192_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : vic_pl192_device(mconfig, PL192_VIC, tag, owner, clock) +{ +}
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