From f1a727b971a59bab6025b4c4111342c27356ca40 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Wed, 5 Jun 2019 11:42:03 -0400
Subject: start at support for multiple CPUs

---
 entry.S | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'entry.S')

diff --git a/entry.S b/entry.S
index 8b3316c..b3d2c55 100644
--- a/entry.S
+++ b/entry.S
@@ -10,12 +10,15 @@
 .section .text
 .globl _entry
 _entry:
-	# set up a stack for C; stack0 is declared in start.
+	# set up a stack for C.
+        # stack0 is declared in start,
+        # with 4096 bytes per CPU.
         la sp, stack0
-        addi sp, sp, 1024
-        addi sp, sp, 1024
-        addi sp, sp, 1024
-        addi sp, sp, 1024
+        li a0, 1024*4
+	csrr a1, mhartid
+        addi a1, a1, 1
+        mul a0, a0, a1
+        add sp, sp, a0
 	# jump to mstart() in start.c
         call mstart
 junk:
-- 
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