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r4000: save exception pc on reset

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This commit is contained in:
Patrick Mackinlay 2021-02-01 13:24:50 +07:00
parent 77e8172b6b
commit e9b945a4b8
1 changed files with 12 additions and 6 deletions
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18
src/devices/cpu/mips/r4000.cpp
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@ -59,7 +59,7 @@
#define USE_ABI_REG_NAMES 1
// cpu instruction fiels
// cpu instruction fields
#define RSREG ((op >> 21) & 31)
#define RTREG ((op >> 16) & 31)
#define RDREG ((op >> 11) & 31)
@ -94,6 +94,9 @@ r4000_base_device::r4000_base_device(machine_config const &mconfig, device_type
: cpu_device(mconfig, type, tag, owner, clock)
, m_program_config_le("program", ENDIANNESS_LITTLE, 64, 32)
, m_program_config_be("program", ENDIANNESS_BIG, 64, 32)
, m_r{}
, m_cp0{}
, m_f{}
, m_fcr0(fcr)
{
m_cp0[CP0_PRId] = prid;
@ -194,15 +197,18 @@ void r4000_base_device::device_start()
void r4000_base_device::device_reset()
{
if (!m_hard_reset)
{
m_cp0[CP0_Status] = SR_BEV | SR_ERL | SR_SR;
m_cp0[CP0_ErrorEPC] = m_pc;
}
else
m_cp0[CP0_Status] = SR_BEV | SR_ERL;
m_branch_state = NONE;
m_pc = s64(s32(0xbfc00000));
m_r[0] = 0;
if (m_hard_reset)
m_cp0[CP0_Status] = SR_BEV | SR_ERL;
else
m_cp0[CP0_Status] = SR_BEV | SR_ERL | SR_SR;
m_cp0[CP0_Wired] = 0;
m_cp0[CP0_Compare] = 0;
m_cp0[CP0_Count] = 0;