Debug dumps over the serial line. Direct output to video memory.

diff --git a/kernel/arch/i386/system.c b/kernel/arch/i386/system.c
index 2f96901d89fdba8302ec2fd6a9b83a2681a4032f..2677333cb66f2192e230735f6de107565445775d 100644 (file)
--- a/kernel/arch/i386/system.c
+++ b/kernel/arch/i386/system.c
@@ -9,6 +9,9 @@
 
 #include "proto.h"
 
+FORWARD _PROTOTYPE( void do_ser_debug, (void));
+FORWARD _PROTOTYPE( void ser_debug, (int c));
+
 PUBLIC void arch_shutdown(int how)
 {
        /* Mask all interrupts, including the clock. */
@@ -47,6 +50,14 @@ PUBLIC void system_init(void)
 #define   LSR_THRE      0x20
 #define COM1_LSR        (COM1_BASE + 5)
 
+#define REG_RBR        0
+#define REG_LSR        5
+#define                LSR_DR  0x1
+
+#define COM1_RBR (COM1_BASE + REG_RBR)
+#define COM1_LSR (COM1_BASE + REG_LSR)
+
+
 PUBLIC void ser_putc(char c)
 {
         int i;
@@ -62,6 +73,52 @@ PUBLIC void ser_putc(char c)
         outb( thr, c);
 }
 
+/*===========================================================================*
+ *                             do_ser_debug                                 * 
+ *===========================================================================*/
+PRIVATE void do_ser_debug()
+{
+       u8_t c, lsr;
+
+       lsr= inb(COM1_LSR);
+       if (!(lsr & LSR_DR))
+               return;
+       c = inb(COM1_RBR);
+       ser_debug(c);
+}
+
+PRIVATE void ser_debug(int c)
+{
+       do_serial_debug++;
+       kprintf("ser_debug: %d\n", c);
+       switch(c)
+       {
+       case '1':
+               ser_dump_proc();
+               break;
+       }
+       do_serial_debug--;
+}
+
+PUBLIC void ser_dump_proc()
+{
+       struct proc *pp;
+
+       for (pp= BEG_PROC_ADDR; pp < END_PROC_ADDR; pp++)
+       {
+               if (pp->p_rts_flags & SLOT_FREE)
+                       continue;
+               kprintf(
+       "%d: 0x%02x %s e %d src %d dst %d prio %d/%d time %d/%d EIP 0x%x\n",
+                       proc_nr(pp),
+                       pp->p_rts_flags, pp->p_name,
+                       pp->p_endpoint, pp->p_getfrom_e, pp->p_sendto_e,
+                       pp->p_priority, pp->p_max_priority,
+                       pp->p_user_time, pp->p_sys_time, 
+                       pp->p_reg.pc);
+       }
+}
+
 #if SPROFILE
 
 PUBLIC int arch_init_profile_clock(u32_t freq)
@@ -100,3 +157,22 @@ PUBLIC void arch_ack_profile_clock(void)
 }
 
 #endif
+
+#define COLOR_BASE     0xB8000L
+
+PUBLIC void cons_setc(int pos, int c)
+{
+       char ch;
+
+       ch= c;
+       phys_copy(vir2phys((vir_bytes)&ch), COLOR_BASE+(20*80+pos)*2, 1);
+}
+
+PUBLIC void cons_seth(int pos, int n)
+{
+       n &= 0xf;
+       if (n < 10)
+               cons_setc(pos, '0'+n);
+       else
+               cons_setc(pos, 'A'+(n-10));
+}