From 15205711b35db0d8ac5516f84ba73fa3550ccc62 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 17 Mar 2022 21:49:10 -0700
Subject: Initialize all BSS sections in MMU
---
include/sys/schedule.h | 2 +-
src/lib/mmu.c | 10 +++++++---
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/include/sys/schedule.h b/include/sys/schedule.h
index f32044c..d0d938c 100644
--- a/include/sys/schedule.h
+++ b/include/sys/schedule.h
@@ -1,7 +1,7 @@
#ifndef SYS_SCHEDULE_H
#define SYS_SCHEDULE_H
-#define TQUEUE_MAX 0x100
+#define TQUEUE_MAX 0x800
#define STACK_SIZE 0x4000
#define TQUEUE_CNT 3
#define PRIORITIES 8
diff --git a/src/lib/mmu.c b/src/lib/mmu.c
index 6a947c5..0a2f892 100644
--- a/src/lib/mmu.c
+++ b/src/lib/mmu.c
@@ -15,11 +15,15 @@ void mmu_section(unsigned long virtual, unsigned long physical, unsigned long fl
*entry = physval;
}
+extern unsigned long __bss_end;
void mmu_init(void)
{
- mmu_section(0x00000000, 0x00000000, CACHABLE | BUFFERABLE);
- for (unsigned long addr = 0x00100000;; addr += 0x00100000) {
- mmu_section(addr, addr, NO_PERMISSIONS_REQUIRED);
+ for (unsigned long addr = 0x00000000;; addr += 0x00100000) {
+ if (addr < (unsigned long)&__bss_end) {
+ mmu_section(addr, addr, CACHABLE | BUFFERABLE);
+ } else {
+ mmu_section(addr, addr, NO_PERMISSIONS_REQUIRED);
+ }
if (addr == 0x02000000)
mmu_section(addr, addr, CACHABLE | BUFFERABLE | NO_PERMISSIONS_REQUIRED);
//else if (addr == 0x3F000000)
--
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