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Dump registers in baremetal plic supervisor test

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This commit is contained in:
Rodrigo Arias 2024-08-29 15:45:59 +02:00
parent 13b9cd8692
commit 58ddfd4720
2 changed files with 93 additions and 0 deletions
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1
overlay.nix
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@ -87,6 +87,7 @@ final: prev:
#./sa-fpga-crt.patch
#./sa-fpga-text-address.patch
./sa-fpga-uart.patch
./sa-fpga-plic-registers.patch
];
buildPhase = ''
cd fpga_core_bridge/simulator/tests/c_tests/

92
sa-fpga-plic-registers.patch Normal file
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@ -0,0 +1,92 @@
diff --git a/fpga_core_bridge/simulator/tests/c_tests/plic_supervisor/plic_supervisor_test.c b/fpga_core_bridge/simulator/tests/c_tests/plic_supervisor/plic_supervisor_test.c
index 0cfa681..78d97cb 100644
--- a/fpga_core_bridge/simulator/tests/c_tests/plic_supervisor/plic_supervisor_test.c
+++ b/fpga_core_bridge/simulator/tests/c_tests/plic_supervisor/plic_supervisor_test.c
@@ -68,6 +68,48 @@ uintptr_t handle_trap(uint64_t cause, uint64_t epc, uintptr_t regs[32])
return epc;
}
+static void dumpregs(int machine)
+{
+ printf("Registers:");
+ if (machine) {
+ uint64_t mie;
+ asm volatile("csrr %0, mie" : "=r"(mie));
+ printf("\n MIE: ");
+ printhex(mie);
+
+ uint64_t mip;
+ asm volatile("csrr %0, mip" : "=r"(mip));
+ printf("\n MIP: ");
+ printhex(mip);
+
+ uint64_t mstatus;
+ asm volatile("csrr %0, mstatus" : "=r"(mstatus));
+ printf("\nMSTATUS: ");
+ printhex(mstatus);
+
+ uint64_t mideleg;
+ asm volatile("csrr %0, mideleg" : "=r"(mideleg));
+ printf("\nMIDELEG: ");
+ printhex(mideleg);
+ }
+
+ uint64_t sie;
+ asm volatile("csrr %0, sie" : "=r"(sie));
+ printf("\n SIE: ");
+ printhex(sie);
+
+ uint64_t sip;
+ asm volatile("csrr %0, sip" : "=r"(sip));
+ printf("\n SIP: ");
+ printhex(sip);
+
+ uint64_t sstatus;
+ asm volatile("csrr %0, sstatus" : "=r"(sstatus));
+ printf("\nSSTATUS: ");
+ printhex(sstatus);
+ printf("\n");
+}
+
// Define the bit positions for the external interrupt enable in mie and mideleg registers
#define SIE_SEIE (1 << 9) // Supervisor External Interrupt Enable
#define MIDELEG_MEIE (1 << 11) // Delegate Machine External Interrupt to Supervisor
@@ -156,16 +198,19 @@ void __attribute__((optimize("O0"))) switch_to_supervisor_mode(uint64_t* target_
asm volatile("mret");
}
-uint64_t supervisor_mode_code() {
- int count = 0;
- while (1) {
- if (count == 10000) {
- uart_write_string("\nWaiting for interrupt in supervisor mode...");
- count = 0;
- }
- count++;
- }
- return 0;
+uint64_t supervisor_mode_code()
+{
+ uart_write_string("\nHello from supervisor mode...");
+ dumpregs(0);
+ int count = 0;
+ while (1) {
+ if (count == 10000) {
+ uart_write_string("\nWaiting for interrupt in supervisor mode...");
+ count = 0;
+ }
+ count++;
+ }
+ return 0;
}
void main(void) {
@@ -181,6 +226,8 @@ void main(void) {
// Enable external timer interrupts
// enable_external_timer_interrupt();
+ dumpregs(1);
+
// Switch to supervisor mode and execute supervisor_mode_code
switch_to_supervisor_mode(&supervisor_mode_code);