From 1aac36f788834699b6891aea7a83eb950bd5e8f6 Mon Sep 17 00:00:00 2001
From: stefan <stefan@s00.xyz>
Date: Sat, 8 Apr 2023 20:42:18 -0400
Subject: no idea whot i changed lol

---
 sys/kern/entry.S | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

(limited to 'sys/kern/entry.S')

diff --git a/sys/kern/entry.S b/sys/kern/entry.S
index fccd80f..03ff76c 100644
--- a/sys/kern/entry.S
+++ b/sys/kern/entry.S
@@ -2,6 +2,7 @@
 
 .globl _start
 _start:
+        /* disable interrupts and poging */ 
         csrw       satp, zero
         csrw       sie, zero
         csrw       sip, zero
@@ -11,33 +12,42 @@ _start:
         la         gp, __global_pointer$
         .option pop
 
+        /* setup stack */
         addi       t0, a0, 1
         li         t1, PAGE_SIZE 
         la         sp, __stack_start
         mul        t1, t1, t0
         add        sp, sp, t1
 
+        /* setup thread pointer */ 
+        mv        tp, a0
+
+        /* the label _boot_hart is shared between threads. only one hart will branch before it is no longer 0 */ 
         li         a2, 1
         lla        a3, _boot_hart
         amoswap.w  a3, a2, (a3)
-        bnez a3,   _spin
+        bnez       a3,   2f
 
+        /* clear the bss section */  
         la         a2, __bss_start
         la         a3, __bss_end
 1:
         sd	   zero, (a2)
         addi       a2, a2, __SIZEOF_POINTER__
         blt        a2, a3, 1b 
-        
+2:
         call       init
-
+        j          _spin
 
 _spin:
 	wfi
 	j _spin
 
 .section ".data"
-_boot_hart: .word 0
+_boot_hart: 
+        .word 0
+
 .section ".rodata"
+/* linker imports */
 .globl HEAP_START
 HEAP_START: .dword __heap_start
-- 
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