#include <common.h>
#include <arm920t.h>
-#if defined(CONFIG_S3C2400)
-#include <s3c2400.h>
-#elif defined(CONFIG_S3C2410)
-#include <s3c2410.h>
-#endif
-
-#include <asm/proc-armv/ptrace.h>
-
-extern void reset_cpu(ulong addr);
-int timer_load_val = 0;
-
-/* macro to read the 16 bit timer */
-static inline ulong READ_TIMER(void)
-{
- S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS();
-
- return (timers->TCNTO4 & 0xffff);
-}
#ifdef CONFIG_USE_IRQ
-/* enable IRQ interrupts */
-void enable_interrupts (void)
-{
- unsigned long temp;
- __asm__ __volatile__("mrs %0, cpsr\n"
- "bic %0, %0, #0x80\n"
- "msr cpsr_c, %0"
- : "=r" (temp)
- :
- : "memory");
-}
-
-
-/*
- * disable IRQ/FIQ interrupts
- * returns true if interrupts had been enabled before we disabled them
- */
-int disable_interrupts (void)
-{
- unsigned long old,temp;
- __asm__ __volatile__("mrs %0, cpsr\n"
- "orr %1, %0, #0xc0\n"
- "msr cpsr_c, %1"
- : "=r" (old), "=r" (temp)
- :
- : "memory");
- return (old & 0x80) == 0;
-}
-#else
-void enable_interrupts (void)
-{
- return;
-}
-int disable_interrupts (void)
-{
- return 0;
-}
-#endif
-
-
-void bad_mode (void)
-{
- panic ("Resetting CPU ...\n");
- reset_cpu (0);
-}
-
-void show_regs (struct pt_regs *regs)
-{
- unsigned long flags;
- const char *processor_modes[] = {
- "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
- "UK4_26", "UK5_26", "UK6_26", "UK7_26",
- "UK8_26", "UK9_26", "UK10_26", "UK11_26",
- "UK12_26", "UK13_26", "UK14_26", "UK15_26",
- "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
- "UK4_32", "UK5_32", "UK6_32", "ABT_32",
- "UK8_32", "UK9_32", "UK10_32", "UND_32",
- "UK12_32", "UK13_32", "UK14_32", "SYS_32",
- };
-
- flags = condition_codes (regs);
-
- printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
- "sp : %08lx ip : %08lx fp : %08lx\n",
- instruction_pointer (regs),
- regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
- printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
- regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
- printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
- regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
- printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
- regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
- printf ("Flags: %c%c%c%c",
- flags & CC_N_BIT ? 'N' : 'n',
- flags & CC_Z_BIT ? 'Z' : 'z',
- flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
- printf (" IRQs %s FIQs %s Mode %s%s\n",
- interrupts_enabled (regs) ? "on" : "off",
- fast_interrupts_enabled (regs) ? "on" : "off",
- processor_modes[processor_mode (regs)],
- thumb_mode (regs) ? " (T)" : "");
-}
-
-void do_undefined_instruction (struct pt_regs *pt_regs)
-{
- printf ("undefined instruction\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_software_interrupt (struct pt_regs *pt_regs)
-{
- printf ("software interrupt\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_prefetch_abort (struct pt_regs *pt_regs)
-{
- printf ("prefetch abort\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_data_abort (struct pt_regs *pt_regs)
-{
- printf ("data abort\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_not_used (struct pt_regs *pt_regs)
-{
- printf ("not used\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_fiq (struct pt_regs *pt_regs)
-{
- printf ("fast interrupt request\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
+#include <asm/proc-armv/ptrace.h>
void do_irq (struct pt_regs *pt_regs)
{
- printf ("interrupt request\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-static ulong timestamp;
-static ulong lastdec;
-
-int interrupt_init (void)
-{
- S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS();
-
- /* use PWM Timer 4 because it has no output */
- /* prescaler for Timer 4 is 16 */
- timers->TCFG0 = 0x0f00;
- if (timer_load_val == 0)
- {
- /*
- * for 10 ms clock period @ PCLK with 4 bit divider = 1/2
- * (default) and prescaler = 16. Should be 10390
- * @33.25MHz and 15625 @ 50 MHz
- */
- timer_load_val = get_PCLK()/(2 * 16 * 100);
- }
- /* load value for 10 ms timeout */
- lastdec = timers->TCNTB4 = timer_load_val;
- /* auto load, manual update of Timer 4 */
- timers->TCON = (timers->TCON & ~0x0700000) | 0x600000;
- /* auto load, start Timer 4 */
- timers->TCON = (timers->TCON & ~0x0700000) | 0x500000;
- timestamp = 0;
-
- return (0);
-}
-
-/*
- * timer without interrupts
- */
-
-void reset_timer (void)
-{
- reset_timer_masked ();
-}
-
-ulong get_timer (ulong base)
-{
- return get_timer_masked () - base;
-}
-
-void set_timer (ulong t)
-{
- timestamp = t;
-}
-
-void udelay (unsigned long usec)
-{
- ulong tmo;
- ulong start = get_timer(0);
-
- tmo = usec / 1000;
- tmo *= (timer_load_val * 100);
- tmo /= 1000;
-
- while ((ulong)(get_timer_masked () - start) < tmo)
- /*NOP*/;
-}
-
-void reset_timer_masked (void)
-{
- /* reset time */
- lastdec = READ_TIMER();
- timestamp = 0;
-}
-
-ulong get_timer_masked (void)
-{
- ulong now = READ_TIMER();
-
- if (lastdec >= now) {
- /* normal mode */
- timestamp += lastdec - now;
- } else {
- /* we have an overflow ... */
- timestamp += lastdec + timer_load_val - now;
- }
- lastdec = now;
-
- return timestamp;
-}
-
-void udelay_masked (unsigned long usec)
-{
- ulong tmo;
-
- tmo = usec / 1000;
- tmo *= (timer_load_val * 100);
- tmo /= 1000;
-
- reset_timer_masked ();
-
- while (get_timer_masked () < tmo)
- /*NOP*/;
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
- return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
-ulong get_tbclk (void)
-{
- ulong tbclk;
-
-#if defined(CONFIG_SMDK2400) || defined(CONFIG_TRAB)
- tbclk = timer_load_val * 100;
-#elif defined(CONFIG_SMDK2410) || defined(CONFIG_VCMA9)
- tbclk = CFG_HZ;
+#if defined (ARM920_IRQ_CALLBACK)
+ ARM920_IRQ_CALLBACK();
+#elif defined (CONFIG_ARCH_INTEGRATOR)
+ /* ASSUMED to be a timer interrupt */
+ /* Just clear it - count handled in */
+ /* integratorap.c */
+ *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0x0C) = 0;
#else
-# error "tbclk not configured"
+#error do_irq() not defined for this cpu type
#endif
-
- return tbclk;
}
+#endif
projects / karo-tx-uboot.git / blobdiff