From ab24ff26666e14b3b6c4a8c8bb2c209d2587bb3e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wojciech=20Mu=C5=82a?= <wojciech_mula@poczta.onet.pl>
Date: Wed, 24 Apr 2024 06:58:59 +0200
Subject: Implementation of riscv_hwprobe syscall from Linux (#325)

See: https://www.kernel.org/doc/html/latest/arch/riscv/hwprobe.html
---
 machine/minit.c | 2 ++
 machine/mtrap.h | 1 +
 2 files changed, 3 insertions(+)

(limited to 'machine')

diff --git a/machine/minit.c b/machine/minit.c
index 95ddaa1..55f50cb 100644
--- a/machine/minit.c
+++ b/machine/minit.c
@@ -17,6 +17,7 @@
 uintptr_t mem_size;
 volatile uint64_t* mtime;
 volatile uint32_t* plic_priorities;
+uint64_t misa_image;
 size_t plic_ndevs;
 void* kernel_start;
 void* kernel_end;
@@ -126,6 +127,7 @@ static void memory_init()
 
 static void hart_init()
 {
+  misa_image = read_csr(misa);
   mstatus_init();
   fp_init();
 #ifndef BBL_BOOT_MACHINE
diff --git a/machine/mtrap.h b/machine/mtrap.h
index 2f2e499..41071f3 100644
--- a/machine/mtrap.h
+++ b/machine/mtrap.h
@@ -35,6 +35,7 @@ extern uintptr_t mem_size;
 extern volatile uint64_t* mtime;
 extern volatile uint32_t* plic_priorities;
 extern size_t plic_ndevs;
+extern uint64_t misa_image;
 
 typedef struct {
   volatile uint32_t* ipi;
-- 
cgit v1.1