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Diffstat (limited to 'hw/mcf5206.c')
-rw-r--r--hw/mcf5206.c289
1 files changed, 8 insertions, 281 deletions
diff --git a/hw/mcf5206.c b/hw/mcf5206.c
index 0da791293d..ce4676bdf1 100644
--- a/hw/mcf5206.c
+++ b/hw/mcf5206.c
@@ -139,285 +139,12 @@ static m5206_timer_state *m5206_timer_init(qemu_irq irq)
return s;
}
-/* UART */
-
-typedef struct {
- uint8_t mr[2];
- uint8_t sr;
- uint8_t isr;
- uint8_t imr;
- uint8_t bg1;
- uint8_t bg2;
- uint8_t fifo[4];
- uint8_t tb;
- int current_mr;
- int fifo_len;
- int tx_enabled;
- int rx_enabled;
- qemu_irq irq;
- CharDriverState *chr;
-} m5206_uart_state;
-
-/* UART Status Register bits. */
-#define M5206_UART_RxRDY 0x01
-#define M5206_UART_FFULL 0x02
-#define M5206_UART_TxRDY 0x04
-#define M5206_UART_TxEMP 0x08
-#define M5206_UART_OE 0x10
-#define M5206_UART_PE 0x20
-#define M5206_UART_FE 0x40
-#define M5206_UART_RB 0x80
-
-/* Interrupt flags. */
-#define M5206_UART_TxINT 0x01
-#define M5206_UART_RxINT 0x02
-#define M5206_UART_DBINT 0x04
-#define M5206_UART_COSINT 0x80
-
-/* UMR1 flags. */
-#define M5206_UART_BC0 0x01
-#define M5206_UART_BC1 0x02
-#define M5206_UART_PT 0x04
-#define M5206_UART_PM0 0x08
-#define M5206_UART_PM1 0x10
-#define M5206_UART_ERR 0x20
-#define M5206_UART_RxIRQ 0x40
-#define M5206_UART_RxRTS 0x80
-
-static void m5206_uart_update(m5206_uart_state *s)
-{
- s->isr &= ~(M5206_UART_TxINT | M5206_UART_RxINT);
- if (s->sr & M5206_UART_TxRDY)
- s->isr |= M5206_UART_TxINT;
- if ((s->sr & ((s->mr[0] & M5206_UART_RxIRQ)
- ? M5206_UART_FFULL : M5206_UART_RxRDY)) != 0)
- s->isr |= M5206_UART_RxINT;
-
- qemu_set_irq(s->irq, (s->isr & s->imr) != 0);
-}
-
-static uint32_t m5206_uart_read(m5206_uart_state *s, uint32_t addr)
-{
- switch (addr) {
- case 0x00:
- return s->mr[s->current_mr];
- case 0x04:
- return s->sr;
- case 0x0c:
- {
- uint8_t val;
- int i;
-
- if (s->fifo_len == 0)
- return 0;
-
- val = s->fifo[0];
- s->fifo_len--;
- for (i = 0; i < s->fifo_len; i++)
- s->fifo[i] = s->fifo[i + 1];
- s->sr &= ~M5206_UART_FFULL;
- if (s->fifo_len == 0)
- s->sr &= ~M5206_UART_RxRDY;
- m5206_uart_update(s);
- return val;
- }
- case 0x10:
- /* TODO: Implement IPCR. */
- return 0;
- case 0x14:
- return s->isr;
- case 0x18:
- return s->bg1;
- case 0x1c:
- return s->bg2;
- default:
- return 0;
- }
-}
-
-/* Update TxRDY flag and set data if present and enabled. */
-static void m5206_uart_do_tx(m5206_uart_state *s)
-{
- if (s->tx_enabled && (s->sr & M5206_UART_TxEMP) == 0) {
- if (s->chr)
- qemu_chr_write(s->chr, (unsigned char *)&s->tb, 1);
- s->sr |= M5206_UART_TxEMP;
- }
- if (s->tx_enabled) {
- s->sr |= M5206_UART_TxRDY;
- } else {
- s->sr &= ~M5206_UART_TxRDY;
- }
-}
-
-static void m5206_do_command(m5206_uart_state *s, uint8_t cmd)
-{
- /* Misc command. */
- switch ((cmd >> 4) & 3) {
- case 0: /* No-op. */
- break;
- case 1: /* Reset mode register pointer. */
- s->current_mr = 0;
- break;
- case 2: /* Reset receiver. */
- s->rx_enabled = 0;
- s->fifo_len = 0;
- s->sr &= ~(M5206_UART_RxRDY | M5206_UART_FFULL);
- break;
- case 3: /* Reset transmitter. */
- s->tx_enabled = 0;
- s->sr |= M5206_UART_TxEMP;
- s->sr &= ~M5206_UART_TxRDY;
- break;
- case 4: /* Reset error status. */
- break;
- case 5: /* Reset break-change interrupt. */
- s->isr &= ~M5206_UART_DBINT;
- break;
- case 6: /* Start break. */
- case 7: /* Stop break. */
- break;
- }
-
- /* Transmitter command. */
- switch ((cmd >> 2) & 3) {
- case 0: /* No-op. */
- break;
- case 1: /* Enable. */
- s->tx_enabled = 1;
- m5206_uart_do_tx(s);
- break;
- case 2: /* Disable. */
- s->tx_enabled = 0;
- m5206_uart_do_tx(s);
- break;
- case 3: /* Reserved. */
- fprintf(stderr, "m5206_uart: Bad TX command\n");
- break;
- }
-
- /* Receiver command. */
- switch (cmd & 3) {
- case 0: /* No-op. */
- break;
- case 1: /* Enable. */
- s->rx_enabled = 1;
- break;
- case 2:
- s->rx_enabled = 0;
- break;
- case 3: /* Reserved. */
- fprintf(stderr, "m5206_uart: Bad RX command\n");
- break;
- }
-}
-
-static void m5206_uart_write(m5206_uart_state *s, uint32_t addr, uint32_t val)
-{
- switch (addr) {
- case 0x00:
- s->mr[s->current_mr] = val;
- s->current_mr = 1;
- break;
- case 0x04:
- /* CSR is ignored. */
- break;
- case 0x08: /* Command Register. */
- m5206_do_command(s, val);
- break;
- case 0x0c: /* Transmit Buffer. */
- s->sr &= ~M5206_UART_TxEMP;
- s->tb = val;
- m5206_uart_do_tx(s);
- break;
- case 0x10:
- /* ACR is ignored. */
- break;
- case 0x14:
- s->imr = val;
- break;
- default:
- break;
- }
- m5206_uart_update(s);
-}
-
-static void m5206_uart_reset(m5206_uart_state *s)
-{
- s->fifo_len = 0;
- s->mr[0] = 0;
- s->mr[1] = 0;
- s->sr = M5206_UART_TxEMP;
- s->tx_enabled = 0;
- s->rx_enabled = 0;
- s->isr = 0;
- s->imr = 0;
-}
-
-static void m5206_uart_push_byte(m5206_uart_state *s, uint8_t data)
-{
- /* Break events overwrite the last byte if the fifo is full. */
- if (s->fifo_len == 4)
- s->fifo_len--;
-
- s->fifo[s->fifo_len] = data;
- s->fifo_len++;
- s->sr |= M5206_UART_RxRDY;
- if (s->fifo_len == 4)
- s->sr |= M5206_UART_FFULL;
-
- m5206_uart_update(s);
-}
-
-static void m5206_uart_event(void *opaque, int event)
-{
- m5206_uart_state *s = (m5206_uart_state *)opaque;
-
- switch (event) {
- case CHR_EVENT_BREAK:
- s->isr |= M5206_UART_DBINT;
- m5206_uart_push_byte(s, 0);
- break;
- default:
- break;
- }
-}
-
-static int m5206_uart_can_receive(void *opaque)
-{
- m5206_uart_state *s = (m5206_uart_state *)opaque;
-
- return s->rx_enabled && (s->sr & M5206_UART_FFULL) == 0;
-}
-
-static void m5206_uart_receive(void *opaque, const uint8_t *buf, int size)
-{
- m5206_uart_state *s = (m5206_uart_state *)opaque;
-
- m5206_uart_push_byte(s, buf[0]);
-}
-
-static m5206_uart_state *m5206_uart_init(qemu_irq irq, CharDriverState *chr)
-{
- m5206_uart_state *s;
-
- s = qemu_mallocz(sizeof(m5206_uart_state));
- s->chr = chr;
- s->irq = irq;
- if (chr) {
- qemu_chr_add_handlers(chr, m5206_uart_can_receive, m5206_uart_receive,
- m5206_uart_event, s);
- }
- m5206_uart_reset(s);
- return s;
-}
-
/* System Integration Module. */
typedef struct {
CPUState *env;
m5206_timer_state *timer[2];
- m5206_uart_state *uart[2];
+ void *uart[2];
uint8_t scr;
uint8_t icr[14];
uint16_t imr; /* 1 == interrupt is masked. */
@@ -540,9 +267,9 @@ static uint32_t m5206_mbar_read(m5206_mbar_state *s, uint32_t offset)
} else if (offset >= 0x120 && offset < 0x140) {
return m5206_timer_read(s->timer[1], offset - 0x120);
} else if (offset >= 0x140 && offset < 0x160) {
- return m5206_uart_read(s->uart[0], offset - 0x140);
+ return mcf_uart_read(s->uart[0], offset - 0x140);
} else if (offset >= 0x180 && offset < 0x1a0) {
- return m5206_uart_read(s->uart[1], offset - 0x180);
+ return mcf_uart_read(s->uart[1], offset - 0x180);
}
switch (offset) {
case 0x03: return s->scr;
@@ -580,10 +307,10 @@ static void m5206_mbar_write(m5206_mbar_state *s, uint32_t offset,
m5206_timer_write(s->timer[1], offset - 0x120, value);
return;
} else if (offset >= 0x140 && offset < 0x160) {
- m5206_uart_write(s->uart[0], offset - 0x140, value);
+ mcf_uart_write(s->uart[0], offset - 0x140, value);
return;
} else if (offset >= 0x180 && offset < 0x1a0) {
- m5206_uart_write(s->uart[1], offset - 0x180, value);
+ mcf_uart_write(s->uart[1], offset - 0x180, value);
return;
}
switch (offset) {
@@ -798,13 +525,13 @@ qemu_irq *mcf5206_init(uint32_t base, CPUState *env)
s = (m5206_mbar_state *)qemu_mallocz(sizeof(m5206_mbar_state));
iomemtype = cpu_register_io_memory(0, m5206_mbar_readfn,
m5206_mbar_writefn, s);
- cpu_register_physical_memory(base, 0x00000fff, iomemtype);
+ cpu_register_physical_memory(base, 0x00001000, iomemtype);
pic = qemu_allocate_irqs(m5206_mbar_set_irq, s, 14);
s->timer[0] = m5206_timer_init(pic[9]);
s->timer[1] = m5206_timer_init(pic[10]);
- s->uart[0] = m5206_uart_init(pic[12], serial_hds[0]);
- s->uart[1] = m5206_uart_init(pic[13], serial_hds[1]);
+ s->uart[0] = mcf_uart_init(pic[12], serial_hds[0]);
+ s->uart[1] = mcf_uart_init(pic[13], serial_hds[1]);
s->env = env;
m5206_mbar_reset(s);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-27 22:52:57 +0000