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We can't allow the supervisor to control SEIP as this would allow the supervisor to clear a pending external interrupt which will result in lost a interrupt in the case a PLIC is attached. The SEIP bit must be hardware controlled when a PLIC is attached. This logic was previously hard-coded so SEIP was always masked even if no PLIC was attached. This patch adds riscv_cpu_claim_interrupts so that the PLIC can register control of SEIP. In the case of models without a PLIC (spike), the SEIP bit remains software controlled. This interface allows for hardware control of supervisor timer and software interrupts by other interrupt controller models. Backports commit e3e7039cc24ecf47d81c091e8bb04552d6564ad8 from qemu |
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.. | ||
insn_trans | ||
cpu.c | ||
cpu.h | ||
cpu_bits.h | ||
cpu_helper.c | ||
cpu_user.h | ||
csr.c | ||
fpu_helper.c | ||
helper.h | ||
insn16.decode | ||
insn32-64.decode | ||
insn32.decode | ||
instmap.h | ||
Makefile.objs | ||
op_helper.c | ||
pmp.c | ||
pmp.h | ||
translate.c | ||
unicorn.c | ||
unicorn.h |