root / hw / mcf5206.c @ b4b784fe
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/*
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* Motorola ColdFire MCF5206 SoC embedded peripheral emulation.
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*
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* Copyright (c) 2007 CodeSourcery.
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*
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* This code is licenced under the GPL
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*/
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#include "hw.h" |
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#include "mcf.h" |
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#include "qemu-timer.h" |
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#include "sysemu.h" |
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|
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/* General purpose timer module. */
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typedef struct { |
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uint16_t tmr; |
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uint16_t trr; |
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uint16_t tcr; |
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uint16_t ter; |
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ptimer_state *timer; |
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qemu_irq irq; |
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int irq_state;
|
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} m5206_timer_state; |
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|
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#define TMR_RST 0x01 |
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#define TMR_CLK 0x06 |
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#define TMR_FRR 0x08 |
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#define TMR_ORI 0x10 |
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#define TMR_OM 0x20 |
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#define TMR_CE 0xc0 |
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|
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#define TER_CAP 0x01 |
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#define TER_REF 0x02 |
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|
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static void m5206_timer_update(m5206_timer_state *s) |
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{ |
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if ((s->tmr & TMR_ORI) != 0 && (s->ter & TER_REF)) |
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qemu_irq_raise(s->irq); |
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else
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qemu_irq_lower(s->irq); |
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} |
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|
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static void m5206_timer_reset(m5206_timer_state *s) |
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{ |
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s->tmr = 0;
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s->trr = 0;
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} |
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|
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static void m5206_timer_recalibrate(m5206_timer_state *s) |
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{ |
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int prescale;
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int mode;
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ptimer_stop(s->timer); |
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if ((s->tmr & TMR_RST) == 0) |
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return;
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|
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prescale = (s->tmr >> 8) + 1; |
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mode = (s->tmr >> 1) & 3; |
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if (mode == 2) |
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prescale *= 16;
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|
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if (mode == 3 || mode == 0) |
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hw_error("m5206_timer: mode %d not implemented\n", mode);
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if ((s->tmr & TMR_FRR) == 0) |
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hw_error("m5206_timer: free running mode not implemented\n");
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|
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/* Assume 66MHz system clock. */
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ptimer_set_freq(s->timer, 66000000 / prescale);
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ptimer_set_limit(s->timer, s->trr, 0);
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ptimer_run(s->timer, 0);
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} |
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static void m5206_timer_trigger(void *opaque) |
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{ |
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m5206_timer_state *s = (m5206_timer_state *)opaque; |
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s->ter |= TER_REF; |
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m5206_timer_update(s); |
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} |
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|
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static uint32_t m5206_timer_read(m5206_timer_state *s, uint32_t addr)
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{ |
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switch (addr) {
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case 0: |
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return s->tmr;
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case 4: |
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return s->trr;
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case 8: |
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return s->tcr;
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case 0xc: |
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return s->trr - ptimer_get_count(s->timer);
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case 0x11: |
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return s->ter;
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default:
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return 0; |
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} |
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} |
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|
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static void m5206_timer_write(m5206_timer_state *s, uint32_t addr, uint32_t val) |
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{ |
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switch (addr) {
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case 0: |
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if ((s->tmr & TMR_RST) != 0 && (val & TMR_RST) == 0) { |
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m5206_timer_reset(s); |
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} |
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s->tmr = val; |
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m5206_timer_recalibrate(s); |
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break;
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case 4: |
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s->trr = val; |
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m5206_timer_recalibrate(s); |
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break;
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case 8: |
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s->tcr = val; |
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break;
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case 0xc: |
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ptimer_set_count(s->timer, val); |
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break;
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case 0x11: |
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s->ter &= ~val; |
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break;
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default:
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break;
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} |
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m5206_timer_update(s); |
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} |
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|
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static m5206_timer_state *m5206_timer_init(qemu_irq irq)
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{ |
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m5206_timer_state *s; |
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QEMUBH *bh; |
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|
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s = (m5206_timer_state *)qemu_mallocz(sizeof(m5206_timer_state));
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bh = qemu_bh_new(m5206_timer_trigger, s); |
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s->timer = ptimer_init(bh); |
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s->irq = irq; |
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m5206_timer_reset(s); |
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return s;
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} |
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|
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/* System Integration Module. */
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|
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typedef struct { |
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CPUState *env; |
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m5206_timer_state *timer[2];
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void *uart[2]; |
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uint8_t scr; |
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uint8_t icr[14];
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uint16_t imr; /* 1 == interrupt is masked. */
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uint16_t ipr; |
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uint8_t rsr; |
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uint8_t swivr; |
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uint8_t par; |
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/* Include the UART vector registers here. */
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uint8_t uivr[2];
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} m5206_mbar_state; |
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|
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/* Interrupt controller. */
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|
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static int m5206_find_pending_irq(m5206_mbar_state *s) |
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{ |
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int level;
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int vector;
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uint16_t active; |
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int i;
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level = 0;
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vector = 0;
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active = s->ipr & ~s->imr; |
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if (!active)
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return 0; |
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for (i = 1; i < 14; i++) { |
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if (active & (1 << i)) { |
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if ((s->icr[i] & 0x1f) > level) { |
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level = s->icr[i] & 0x1f;
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vector = i; |
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} |
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} |
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} |
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if (level < 4) |
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vector = 0;
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return vector;
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} |
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static void m5206_mbar_update(m5206_mbar_state *s) |
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{ |
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int irq;
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int vector;
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int level;
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irq = m5206_find_pending_irq(s); |
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if (irq) {
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int tmp;
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tmp = s->icr[irq]; |
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level = (tmp >> 2) & 7; |
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if (tmp & 0x80) { |
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/* Autovector. */
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vector = 24 + level;
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} else {
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switch (irq) {
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case 8: /* SWT */ |
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vector = s->swivr; |
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break;
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case 12: /* UART1 */ |
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vector = s->uivr[0];
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break;
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case 13: /* UART2 */ |
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vector = s->uivr[1];
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break;
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default:
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/* Unknown vector. */
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fprintf(stderr, "Unhandled vector for IRQ %d\n", irq);
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vector = 0xf;
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break;
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} |
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} |
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} else {
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level = 0;
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vector = 0;
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} |
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m68k_set_irq_level(s->env, level, vector); |
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} |
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static void m5206_mbar_set_irq(void *opaque, int irq, int level) |
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{ |
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m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
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if (level) {
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s->ipr |= 1 << irq;
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} else {
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s->ipr &= ~(1 << irq);
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} |
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m5206_mbar_update(s); |
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} |
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|
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/* System Integration Module. */
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static void m5206_mbar_reset(m5206_mbar_state *s) |
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{ |
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s->scr = 0xc0;
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s->icr[1] = 0x04; |
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s->icr[2] = 0x08; |
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s->icr[3] = 0x0c; |
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s->icr[4] = 0x10; |
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s->icr[5] = 0x14; |
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s->icr[6] = 0x18; |
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s->icr[7] = 0x1c; |
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s->icr[8] = 0x1c; |
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s->icr[9] = 0x80; |
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s->icr[10] = 0x80; |
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s->icr[11] = 0x80; |
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s->icr[12] = 0x00; |
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s->icr[13] = 0x00; |
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s->imr = 0x3ffe;
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s->rsr = 0x80;
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s->swivr = 0x0f;
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s->par = 0;
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} |
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static uint32_t m5206_mbar_read(m5206_mbar_state *s, uint32_t offset)
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{ |
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if (offset >= 0x100 && offset < 0x120) { |
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return m5206_timer_read(s->timer[0], offset - 0x100); |
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} else if (offset >= 0x120 && offset < 0x140) { |
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return m5206_timer_read(s->timer[1], offset - 0x120); |
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} else if (offset >= 0x140 && offset < 0x160) { |
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return mcf_uart_read(s->uart[0], offset - 0x140); |
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} else if (offset >= 0x180 && offset < 0x1a0) { |
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return mcf_uart_read(s->uart[1], offset - 0x180); |
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} |
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switch (offset) {
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case 0x03: return s->scr; |
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case 0x14 ... 0x20: return s->icr[offset - 0x13]; |
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case 0x36: return s->imr; |
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case 0x3a: return s->ipr; |
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case 0x40: return s->rsr; |
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case 0x41: return 0; |
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case 0x42: return s->swivr; |
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case 0x50: |
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/* DRAM mask register. */
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/* FIXME: currently hardcoded to 128Mb. */
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{ |
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uint32_t mask = ~0;
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while (mask > ram_size)
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mask >>= 1;
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return mask & 0x0ffe0000; |
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} |
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case 0x5c: return 1; /* DRAM bank 1 empty. */ |
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case 0xcb: return s->par; |
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case 0x170: return s->uivr[0]; |
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case 0x1b0: return s->uivr[1]; |
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} |
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hw_error("Bad MBAR read offset 0x%x", (int)offset); |
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return 0; |
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} |
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|
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static void m5206_mbar_write(m5206_mbar_state *s, uint32_t offset, |
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uint32_t value) |
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{ |
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if (offset >= 0x100 && offset < 0x120) { |
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m5206_timer_write(s->timer[0], offset - 0x100, value); |
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return;
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} else if (offset >= 0x120 && offset < 0x140) { |
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m5206_timer_write(s->timer[1], offset - 0x120, value); |
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return;
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} else if (offset >= 0x140 && offset < 0x160) { |
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mcf_uart_write(s->uart[0], offset - 0x140, value); |
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return;
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} else if (offset >= 0x180 && offset < 0x1a0) { |
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mcf_uart_write(s->uart[1], offset - 0x180, value); |
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return;
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} |
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switch (offset) {
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case 0x03: |
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s->scr = value; |
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break;
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case 0x14 ... 0x20: |
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s->icr[offset - 0x13] = value;
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m5206_mbar_update(s); |
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break;
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case 0x36: |
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s->imr = value; |
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m5206_mbar_update(s); |
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break;
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case 0x40: |
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s->rsr &= ~value; |
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break;
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case 0x41: |
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/* TODO: implement watchdog. */
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break;
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case 0x42: |
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s->swivr = value; |
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break;
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case 0xcb: |
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s->par = value; |
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break;
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case 0x170: |
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s->uivr[0] = value;
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break;
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case 0x178: case 0x17c: case 0x1c8: case 0x1bc: |
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/* Not implemented: UART Output port bits. */
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break;
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case 0x1b0: |
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s->uivr[1] = value;
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break;
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default:
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hw_error("Bad MBAR write offset 0x%x", (int)offset); |
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break;
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} |
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} |
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|
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/* Internal peripherals use a variety of register widths.
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This lookup table allows a single routine to handle all of them. */
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static const int m5206_mbar_width[] = |
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{ |
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/* 000-040 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, |
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/* 040-080 */ 1, 2, 2, 2, 4, 1, 2, 4, 1, 2, 4, 2, 2, 4, 2, 2, |
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/* 080-0c0 */ 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, |
363 |
/* 0c0-100 */ 2, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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/* 100-140 */ 2, 2, 2, 2, 1, 0, 0, 0, 2, 2, 2, 2, 1, 0, 0, 0, |
365 |
/* 140-180 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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/* 180-1c0 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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/* 1c0-200 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
368 |
}; |
369 |
|
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static uint32_t m5206_mbar_readw(void *opaque, target_phys_addr_t offset); |
371 |
static uint32_t m5206_mbar_readl(void *opaque, target_phys_addr_t offset); |
372 |
|
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static uint32_t m5206_mbar_readb(void *opaque, target_phys_addr_t offset) |
374 |
{ |
375 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
376 |
offset &= 0x3ff;
|
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if (offset > 0x200) { |
378 |
hw_error("Bad MBAR read offset 0x%x", (int)offset); |
379 |
} |
380 |
if (m5206_mbar_width[offset >> 2] > 1) { |
381 |
uint16_t val; |
382 |
val = m5206_mbar_readw(opaque, offset & ~1);
|
383 |
if ((offset & 1) == 0) { |
384 |
val >>= 8;
|
385 |
} |
386 |
return val & 0xff; |
387 |
} |
388 |
return m5206_mbar_read(s, offset);
|
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} |
390 |
|
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static uint32_t m5206_mbar_readw(void *opaque, target_phys_addr_t offset) |
392 |
{ |
393 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
394 |
int width;
|
395 |
offset &= 0x3ff;
|
396 |
if (offset > 0x200) { |
397 |
hw_error("Bad MBAR read offset 0x%x", (int)offset); |
398 |
} |
399 |
width = m5206_mbar_width[offset >> 2];
|
400 |
if (width > 2) { |
401 |
uint32_t val; |
402 |
val = m5206_mbar_readl(opaque, offset & ~3);
|
403 |
if ((offset & 3) == 0) |
404 |
val >>= 16;
|
405 |
return val & 0xffff; |
406 |
} else if (width < 2) { |
407 |
uint16_t val; |
408 |
val = m5206_mbar_readb(opaque, offset) << 8;
|
409 |
val |= m5206_mbar_readb(opaque, offset + 1);
|
410 |
return val;
|
411 |
} |
412 |
return m5206_mbar_read(s, offset);
|
413 |
} |
414 |
|
415 |
static uint32_t m5206_mbar_readl(void *opaque, target_phys_addr_t offset) |
416 |
{ |
417 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
418 |
int width;
|
419 |
offset &= 0x3ff;
|
420 |
if (offset > 0x200) { |
421 |
hw_error("Bad MBAR read offset 0x%x", (int)offset); |
422 |
} |
423 |
width = m5206_mbar_width[offset >> 2];
|
424 |
if (width < 4) { |
425 |
uint32_t val; |
426 |
val = m5206_mbar_readw(opaque, offset) << 16;
|
427 |
val |= m5206_mbar_readw(opaque, offset + 2);
|
428 |
return val;
|
429 |
} |
430 |
return m5206_mbar_read(s, offset);
|
431 |
} |
432 |
|
433 |
static void m5206_mbar_writew(void *opaque, target_phys_addr_t offset, |
434 |
uint32_t value); |
435 |
static void m5206_mbar_writel(void *opaque, target_phys_addr_t offset, |
436 |
uint32_t value); |
437 |
|
438 |
static void m5206_mbar_writeb(void *opaque, target_phys_addr_t offset, |
439 |
uint32_t value) |
440 |
{ |
441 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
442 |
int width;
|
443 |
offset &= 0x3ff;
|
444 |
if (offset > 0x200) { |
445 |
hw_error("Bad MBAR write offset 0x%x", (int)offset); |
446 |
} |
447 |
width = m5206_mbar_width[offset >> 2];
|
448 |
if (width > 1) { |
449 |
uint32_t tmp; |
450 |
tmp = m5206_mbar_readw(opaque, offset & ~1);
|
451 |
if (offset & 1) { |
452 |
tmp = (tmp & 0xff00) | value;
|
453 |
} else {
|
454 |
tmp = (tmp & 0x00ff) | (value << 8); |
455 |
} |
456 |
m5206_mbar_writew(opaque, offset & ~1, tmp);
|
457 |
return;
|
458 |
} |
459 |
m5206_mbar_write(s, offset, value); |
460 |
} |
461 |
|
462 |
static void m5206_mbar_writew(void *opaque, target_phys_addr_t offset, |
463 |
uint32_t value) |
464 |
{ |
465 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
466 |
int width;
|
467 |
offset &= 0x3ff;
|
468 |
if (offset > 0x200) { |
469 |
hw_error("Bad MBAR write offset 0x%x", (int)offset); |
470 |
} |
471 |
width = m5206_mbar_width[offset >> 2];
|
472 |
if (width > 2) { |
473 |
uint32_t tmp; |
474 |
tmp = m5206_mbar_readl(opaque, offset & ~3);
|
475 |
if (offset & 3) { |
476 |
tmp = (tmp & 0xffff0000) | value;
|
477 |
} else {
|
478 |
tmp = (tmp & 0x0000ffff) | (value << 16); |
479 |
} |
480 |
m5206_mbar_writel(opaque, offset & ~3, tmp);
|
481 |
return;
|
482 |
} else if (width < 2) { |
483 |
m5206_mbar_writeb(opaque, offset, value >> 8);
|
484 |
m5206_mbar_writeb(opaque, offset + 1, value & 0xff); |
485 |
return;
|
486 |
} |
487 |
m5206_mbar_write(s, offset, value); |
488 |
} |
489 |
|
490 |
static void m5206_mbar_writel(void *opaque, target_phys_addr_t offset, |
491 |
uint32_t value) |
492 |
{ |
493 |
m5206_mbar_state *s = (m5206_mbar_state *)opaque; |
494 |
int width;
|
495 |
offset &= 0x3ff;
|
496 |
if (offset > 0x200) { |
497 |
hw_error("Bad MBAR write offset 0x%x", (int)offset); |
498 |
} |
499 |
width = m5206_mbar_width[offset >> 2];
|
500 |
if (width < 4) { |
501 |
m5206_mbar_writew(opaque, offset, value >> 16);
|
502 |
m5206_mbar_writew(opaque, offset + 2, value & 0xffff); |
503 |
return;
|
504 |
} |
505 |
m5206_mbar_write(s, offset, value); |
506 |
} |
507 |
|
508 |
static CPUReadMemoryFunc * const m5206_mbar_readfn[] = { |
509 |
m5206_mbar_readb, |
510 |
m5206_mbar_readw, |
511 |
m5206_mbar_readl |
512 |
}; |
513 |
|
514 |
static CPUWriteMemoryFunc * const m5206_mbar_writefn[] = { |
515 |
m5206_mbar_writeb, |
516 |
m5206_mbar_writew, |
517 |
m5206_mbar_writel |
518 |
}; |
519 |
|
520 |
qemu_irq *mcf5206_init(uint32_t base, CPUState *env) |
521 |
{ |
522 |
m5206_mbar_state *s; |
523 |
qemu_irq *pic; |
524 |
int iomemtype;
|
525 |
|
526 |
s = (m5206_mbar_state *)qemu_mallocz(sizeof(m5206_mbar_state));
|
527 |
iomemtype = cpu_register_io_memory(m5206_mbar_readfn, |
528 |
m5206_mbar_writefn, s); |
529 |
cpu_register_physical_memory(base, 0x00001000, iomemtype);
|
530 |
|
531 |
pic = qemu_allocate_irqs(m5206_mbar_set_irq, s, 14);
|
532 |
s->timer[0] = m5206_timer_init(pic[9]); |
533 |
s->timer[1] = m5206_timer_init(pic[10]); |
534 |
s->uart[0] = mcf_uart_init(pic[12], serial_hds[0]); |
535 |
s->uart[1] = mcf_uart_init(pic[13], serial_hds[1]); |
536 |
s->env = env; |
537 |
|
538 |
m5206_mbar_reset(s); |
539 |
return pic;
|
540 |
} |