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

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This commit is contained in:
Philip Homburg 2007-04-23 14:25:17 +00:00
parent c59b23859e
commit 13da935060
1 changed files with 76 additions and 0 deletions
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76
kernel/arch/i386/system.c
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@ -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));
}