os-workshop

commit 43b54ea4b100605eba2a1e3842bd263ee7dd253e
parent 08ac4203fbde7508c7080b47a4302f31c29a72cf
Author: Brian Swetland <swetland@frotz.net>
Date:   Sat, 23 Apr 2022 20:06:34 -0700

start: active hartid is passed to bootcode via a0

- so don't clobber it

Diffstat:
M
hw/src/start.S
 | 
1
-
M
misc/info.c
 | 
3
+--

2 files changed, 1 insertion(+), 3 deletions(-)
diff --git a/hw/src/start.S b/hw/src/start.S
@@ -4,7 +4,6 @@
 .globl _start
 _start:
 	li sp, 0x81000000
-	mv a0, sp
 	jal start
 
 .globl exit
diff --git a/misc/info.c b/misc/info.c
@@ -4,8 +4,7 @@
 #include <hw/debug.h>
 #include <hw/riscv.h>
 
-void start(uint32_t sp, uint32_t dtb) {
-	xprintf("Hello?\n");
+void start(uint32_t hartid, uint32_t dtb) {
 	xprintf("MSTATUS    %08x\n", csr_read(CSR_MSTATUS));
 	xprintf("MISA       %08x\n", csr_read(CSR_MISA));
 	xprintf("MCYCLE     %08x\n", csr_read(CSR_MCYCLE));