* Patch by Marc Singer, 29 May 2003:LABEL_2003_05_31_2115

  Fixed rarp boot method for IA32 and other little-endian CPUs.

* Patch by Marc Singer, 28 May 2003:
  Added port I/O commands.

* Patch by Matthew McClintock, 28 May 2003
  - cpu/mpc824x/start.S: fix relocation code when booting from RAM
  - minor patches for utx8245

* Patch by Daniel Engström, 28 May 2003:
  x86 update

* Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
  add nand flash support to SXNI855T configuration
  fix/extend nand flash support:
  - fix 'nand erase' command so does not erase bad blocks
  - fix 'nand write' command so does not write to bad blocks
  - fix nand_probe() so handles no flash detected properly
  - add doc/README.nand
  - add .jffs2 and .oob options to nand read/write
  - add 'nand bad' command to list bad blocks
  - add 'clean' option to 'nand erase' to write JFFS2 clean markers
  - make NAND read/write faster

* Patch by Rune Torgersen, 23 May 2003:
  Update for MPC8266ADS board

1 files changed, 19 insertions, 48 deletions

diff --git a/cpu/i386/interrupts.c b/cpu/i386/interrupts.c
index 81d688185..614d40846 100644
--- a/cpu/i386/interrupts.c
+++ b/cpu/i386/interrupts.c
@@ -29,22 +29,6 @@
 #include <asm/ibmpc.h>
 
 
-#if 0
-/* done */
-int	interrupt_init     (void);
-void	irq_install_handler(int, interrupt_handler_t *, void *);
-void	irq_free_handler   (int);
-void	enable_interrupts  (void);
-int	disable_interrupts (void);
-
-/* todo */
-void	timer_interrupt    (struct pt_regs *);
-void	external_interrupt (struct pt_regs *);
-void	reset_timer	   (void);
-ulong	get_timer	   (ulong base);
-void	set_timer	   (ulong t);
-
-#endif
 
 struct idt_entry {
 	u16	base_low;
@@ -76,43 +60,30 @@ typedef struct {
 static irq_desc_t irq_table[MAX_IRQ];
 
 
-/* syscall stuff, very untested 
- * the current approach which includes copying
- * part of the stack will work badly for 
- * varargs functions.
- * if we were to store the top three words on the
- * stack (eip, ss, eflags) somwhere and add 14 to
- * %esp ....
- */
+
 asm(".globl syscall_entry\n" \
         "syscall_entry:\n" \
-        "movl   12(%esp), %eax\n" \
-	"movl   %esp, %ebx\n" \
-        "addl   $16, %ebx\n" \
-        "pushl  %ebx\n" \
-        "pushl  %eax\n" \
-        "call   do_syscall\n" \
-        "addl   $8, %esp\n" \
-        "iret\n");
+        "popl   %ebx\n"        /* throw away the return address, flags  */ \
+        "popl   %ebx\n"        /* and segment that the INT instruction pushed */ \
+        "popl   %ebx\n"        /* on to the stack */ \
+        "movl   %eax, %ecx\n"  /* load the syscall nr argument*/ \
+        "movl   syscall_tbl, %eax\n" /* load start of syscall table */ \
+        "cmpl   $(11-1), %ecx\n"  /* FixMe: find a way to use NR_SYSCALLS macro here */ \
+        "ja     bad_syscall\n" \
+        "movl   (%eax, %ecx, 4), %eax\n" /* load the handler of the syscall*/ \
+        "test   %eax, %eax\n" /* test for null */ \
+        "je     bad_syscall\n" \
+        "popl   %ecx\n" \
+        "popl   %ebx\n" \
+        "sti    \n" \
+        "jmp    *%eax\n" \
+"bad_syscall: movl $0xffffffff, %eax\n" \
+        "popl   %ecx\n" \
+        "popl   %ebx\n" \
+        "ret");
 
 void __attribute__ ((regparm(0))) syscall_entry(void);
 
-int __attribute__ ((regparm(0))) do_syscall(u32 nr, u32 *stack)
-{
-	if (nr<NR_SYSCALLS) {
-		/* We copy 8 args of the syscall,
-		 * this will be a problem with the 
-		 * printf syscall .... */
-		int (*fp)(u32, u32, u32, u32,
-			  u32, u32, u32, u32);
-		fp = syscall_tbl[nr];
-		return fp(stack[0], stack[1], stack[2], stack[3],
-					     stack[4], stack[5], stack[6], stack[7]);
-	}
-	
-	return -1;
-}
-	
 
 asm ("irq_return:\n"
      "     addl  $4, %esp\n"