Changeset 021d471 in mainline for arch/mips32/src

Timestamp:

2006-02-06T15:56:40Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

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

Children:

9b9f195

Parents:

f5935ed

Message:

Added MIPS userspace. Currently can't make it work in gxemul.

Location:

arch/mips32/src

Files:

• exception.c (modified) (3 diffs)
• mips32.c (modified) (3 diffs)

arch/mips32/src/exception.c

@@ -41 +41 @@
 #include <console/kconsole.h>
 #include <arch/debugger.h>
+#include <syscall/syscall.h>
 
 static char * exctable[] = {
@@ -135 +136 @@
 }
 
+#include <debug.h>
+/** Handle syscall userspace call */
+static void syscall_exception(int n, void *data)
+{
+        struct exception_regdump *pstate = (struct exception_regdump *)data;
+        
+        if (pstate->a3 < SYSCALL_END)
+                pstate->v0 = syscall_table[pstate->a3](pstate->a0,
+                                                       pstate->a1,
+                                                       pstate->a2);
+        else
+                panic("Undefined syscall %d", pstate->a3);
+        pstate->epc += 4;
+}
+
 
 void exception(struct exception_regdump *pstate)
@@ -191 +207 @@
         exc_register(EXC_CpU, "cpunus", cpuns_exception);
 #endif
-}
+        exc_register(EXC_Sys, "syscall", syscall_exception);
+}

arch/mips32/src/mips32.c

@@ -96 +96 @@
         arc_print_memory_map();
         arc_print_devices();
+
+        /* Setup usermode...*/
+        config.init_addr = 0x20000000;
+        config.init_size = FRAME_SIZE;
 }
 
@@ -110 +114 @@
 }
 
+/* Stack pointer saved when entering user mode */
+/* TODO: How do we do it on SMP system???? */
+
+/* Why the hell moves the linker the variable 64K away in assembler
+ * when not in .text section ????????
+ */
+__address supervisor_sp __attribute__ ((section (".text")));
+
 void userspace(void)
 {
@@ -123 +135 @@
 }
 
-/* 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)
 {