2 * Motorola ColdFire MCF5208 SoC emulation.
4 * Copyright (c) 2007 CodeSourcery.
6 * This code is licenced under the GPL
10 #include "qemu-timer.h"
15 #define SYS_FREQ 66000000
17 #define PCSR_EN 0x0001
18 #define PCSR_RLD 0x0002
19 #define PCSR_PIF 0x0004
20 #define PCSR_PIE 0x0008
21 #define PCSR_OVW 0x0010
22 #define PCSR_DBG 0x0020
23 #define PCSR_DOZE 0x0040
24 #define PCSR_PRE_SHIFT 8
25 #define PCSR_PRE_MASK 0x0f00
35 static void m5208_timer_update(m5208_timer_state *s)
37 if ((s->pcsr & (PCSR_PIE | PCSR_PIF)) == (PCSR_PIE | PCSR_PIF))
38 qemu_irq_raise(s->irq);
40 qemu_irq_lower(s->irq);
43 static void m5208_timer_write(void *opaque, target_phys_addr_t offset,
46 m5208_timer_state *s = (m5208_timer_state *)opaque;
51 /* The PIF bit is set-to-clear. */
52 if (value & PCSR_PIF) {
56 /* Avoid frobbing the timer if we're just twiddling IRQ bits. */
57 if (((s->pcsr ^ value) & ~PCSR_PIE) == 0) {
59 m5208_timer_update(s);
63 if (s->pcsr & PCSR_EN)
64 ptimer_stop(s->timer);
68 prescale = 1 << ((s->pcsr & PCSR_PRE_MASK) >> PCSR_PRE_SHIFT);
69 ptimer_set_freq(s->timer, (SYS_FREQ / 2) / prescale);
70 if (s->pcsr & PCSR_RLD)
74 ptimer_set_limit(s->timer, limit, 0);
76 if (s->pcsr & PCSR_EN)
77 ptimer_run(s->timer, 0);
82 if ((s->pcsr & PCSR_RLD) == 0) {
83 if (s->pcsr & PCSR_OVW)
84 ptimer_set_count(s->timer, value);
86 ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW);
92 hw_error("m5208_timer_write: Bad offset 0x%x\n", (int)offset);
95 m5208_timer_update(s);
98 static void m5208_timer_trigger(void *opaque)
100 m5208_timer_state *s = (m5208_timer_state *)opaque;
102 m5208_timer_update(s);
105 static uint32_t m5208_timer_read(void *opaque, target_phys_addr_t addr)
107 m5208_timer_state *s = (m5208_timer_state *)opaque;
114 return ptimer_get_count(s->timer);
116 hw_error("m5208_timer_read: Bad offset 0x%x\n", (int)addr);
121 static CPUReadMemoryFunc *m5208_timer_readfn[] = {
127 static CPUWriteMemoryFunc *m5208_timer_writefn[] = {
133 static uint32_t m5208_sys_read(void *opaque, target_phys_addr_t addr)
136 case 0x110: /* SDCS0 */
139 for (n = 0; n < 32; n++) {
140 if (ram_size < (2u << n))
143 return (n - 1) | 0x40000000;
145 case 0x114: /* SDCS1 */
149 hw_error("m5208_sys_read: Bad offset 0x%x\n", (int)addr);
154 static void m5208_sys_write(void *opaque, target_phys_addr_t addr,
157 hw_error("m5208_sys_write: Bad offset 0x%x\n", (int)addr);
160 static CPUReadMemoryFunc *m5208_sys_readfn[] = {
166 static CPUWriteMemoryFunc *m5208_sys_writefn[] = {
172 static void mcf5208_sys_init(qemu_irq *pic)
175 m5208_timer_state *s;
179 iomemtype = cpu_register_io_memory(0, m5208_sys_readfn,
180 m5208_sys_writefn, NULL);
182 cpu_register_physical_memory(0xfc0a8000, 0x00004000, iomemtype);
184 for (i = 0; i < 2; i++) {
185 s = (m5208_timer_state *)qemu_mallocz(sizeof(m5208_timer_state));
186 bh = qemu_bh_new(m5208_timer_trigger, s);
187 s->timer = ptimer_init(bh);
188 iomemtype = cpu_register_io_memory(0, m5208_timer_readfn,
189 m5208_timer_writefn, s);
190 cpu_register_physical_memory(0xfc080000 + 0x4000 * i, 0x00004000,
196 static void mcf5208evb_init(ram_addr_t ram_size,
197 const char *boot_device,
198 const char *kernel_filename, const char *kernel_cmdline,
199 const char *initrd_filename, const char *cpu_model)
209 env = cpu_init(cpu_model);
211 fprintf(stderr, "Unable to find m68k CPU definition\n");
215 /* Initialize CPU registers. */
217 /* TODO: Configure BARs. */
219 /* DRAM at 0x40000000 */
220 cpu_register_physical_memory(0x40000000, ram_size,
221 qemu_ram_alloc(ram_size) | IO_MEM_RAM);
224 cpu_register_physical_memory(0x80000000, 16384,
225 qemu_ram_alloc(16384) | IO_MEM_RAM);
227 /* Internal peripherals. */
228 pic = mcf_intc_init(0xfc048000, env);
230 mcf_uart_mm_init(0xfc060000, pic[26], serial_hds[0]);
231 mcf_uart_mm_init(0xfc064000, pic[27], serial_hds[1]);
232 mcf_uart_mm_init(0xfc068000, pic[28], serial_hds[2]);
234 mcf5208_sys_init(pic);
237 fprintf(stderr, "Too many NICs\n");
240 if (nd_table[0].vlan)
241 mcf_fec_init(&nd_table[0], 0xfc030000, pic + 36);
243 /* 0xfc000000 SCM. */
244 /* 0xfc004000 XBS. */
245 /* 0xfc008000 FlexBus CS. */
246 /* 0xfc030000 FEC. */
247 /* 0xfc040000 SCM + Power management. */
248 /* 0xfc044000 eDMA. */
249 /* 0xfc048000 INTC. */
250 /* 0xfc058000 I2C. */
251 /* 0xfc05c000 QSPI. */
252 /* 0xfc060000 UART0. */
253 /* 0xfc064000 UART0. */
254 /* 0xfc068000 UART0. */
255 /* 0xfc070000 DMA timers. */
256 /* 0xfc080000 PIT0. */
257 /* 0xfc084000 PIT1. */
258 /* 0xfc088000 EPORT. */
259 /* 0xfc08c000 Watchdog. */
260 /* 0xfc090000 clock module. */
261 /* 0xfc0a0000 CCM + reset. */
262 /* 0xfc0a4000 GPIO. */
263 /* 0xfc0a8000 SDRAM controller. */
266 if (!kernel_filename) {
267 fprintf(stderr, "Kernel image must be specified\n");
271 kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
273 if (kernel_size < 0) {
274 kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
276 if (kernel_size < 0) {
277 kernel_size = load_image_targphys(kernel_filename, 0x40000000,
281 if (kernel_size < 0) {
282 fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
289 static QEMUMachine mcf5208evb_machine = {
290 .name = "mcf5208evb",
291 .desc = "MCF5206EVB",
292 .init = mcf5208evb_init,
296 static void mcf5208evb_machine_init(void)
298 qemu_register_machine(&mcf5208evb_machine);
301 machine_init(mcf5208evb_machine_init);