Add PLIC emulation

We need an interrupt controller in Spike which will allow us to
emulate more real-world devices such as UART, VirtIO net, VirtIO
block, etc.

The RISC-V PLIC (or SiFive PLIC) is the commonly used interrupt
controller in existing RISC-V platforms so this patch adds PLIC
emulation for Spike.

Signed-off-by: Anup Patel <anup@brainfault.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/riscv/dts.h b/riscv/dts.h
index 6208151..66add51 100644
--- a/riscv/dts.h
+++ b/riscv/dts.h
@@ -21,6 +21,8 @@ int fdt_get_next_subnode(void *fdt, int node);
 
 int fdt_parse_clint(void *fdt, reg_t *clint_addr,
                     const char *compatible);
+int fdt_parse_plic(void *fdt, reg_t *plic_addr, uint32_t *ndev,
+                   const char *compatible);
 int fdt_parse_pmp_num(void *fdt, int cpu_offset, reg_t *pmp_num);
 int fdt_parse_pmp_alignment(void *fdt, int cpu_offset, reg_t *pmp_align);
 int fdt_parse_mmu_type(void *fdt, int cpu_offset, const char **mmu_type);