Changeset 2bd4fdf in mainline for arch/mips/src/mips.c

Timestamp:

2005-09-06T23:10:17Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0b512a8

Parents:

2c9de7e

Message:

MIPS bug fixes.
Added usermode to MIPS, unfortunately impossible to test until
MM is ready.

File:

• arch/mips/src/mips.c (modified) (2 diffs)

arch/mips/src/mips.c

@@ -30 +30 @@
 #include <arch/cp0.h>
 #include <arch/exception.h>
+#include <arch/asm/regname.h>
+#include <arch/asm.h>
+#include <mm/vm.h>
+#include <userspace.h>
 
 void arch_pre_mm_init(void)
@@ -58 +62 @@
 {
 }
+
+void userspace(void)
+{
+        /* EXL=1, UM=1, IE=1 */
+        cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
+                                              cp0_status_um_bit |
+                                              cp0_status_ie_enabled_bit));
+        
+        cp0_epc_write(UTEXT_ADDRESS);
+        userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
+        while (1)
+                ;
+}
+
+/* Stack pointer saved when entering user mode */
+/* TODO: How do we do it on SMP system???? */
+__address supervisor_sp;
+
+void before_thread_runs_arch(void)
+{
+        supervisor_sp = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
+}
+
+