[qemu.git] / hw / mcf5208.c

/*
 * Motorola ColdFire MCF5208 SoC emulation.
 *
 * Copyright (c) 2007 CodeSourcery.
 *
 * This code is licenced under the GPL
 */
#include "hw.h"
#include "mcf.h"
#include "qemu-timer.h"
#include "sysemu.h"
#include "net.h"
#include "boards.h"

#define SYS_FREQ 66000000

#define PCSR_EN         0x0001
#define PCSR_RLD        0x0002
#define PCSR_PIF        0x0004
#define PCSR_PIE        0x0008
#define PCSR_OVW        0x0010
#define PCSR_DBG        0x0020
#define PCSR_DOZE       0x0040
#define PCSR_PRE_SHIFT  8
#define PCSR_PRE_MASK   0x0f00

typedef struct {
    qemu_irq irq;
    ptimer_state *timer;
    uint16_t pcsr;
    uint16_t pmr;
    uint16_t pcntr;
} m5208_timer_state;

static void m5208_timer_update(m5208_timer_state *s)
{
    if ((s->pcsr & (PCSR_PIE | PCSR_PIF)) == (PCSR_PIE | PCSR_PIF))
        qemu_irq_raise(s->irq);
    else
        qemu_irq_lower(s->irq);
}

static void m5208_timer_write(m5208_timer_state *s, int offset,
                              uint32_t value)
{
    int prescale;
    int limit;
    switch (offset) {
    case 0:
        /* The PIF bit is set-to-clear.  */
        if (value & PCSR_PIF) {
            s->pcsr &= ~PCSR_PIF;
            value &= ~PCSR_PIF;
        }
        /* Avoid frobbing the timer if we're just twiddling IRQ bits. */
        if (((s->pcsr ^ value) & ~PCSR_PIE) == 0) {
            s->pcsr = value;
            m5208_timer_update(s);
            return;
        }

        if (s->pcsr & PCSR_EN)
            ptimer_stop(s->timer);

        s->pcsr = value;

        prescale = 1 << ((s->pcsr & PCSR_PRE_MASK) >> PCSR_PRE_SHIFT);
        ptimer_set_freq(s->timer, (SYS_FREQ / 2) / prescale);
        if (s->pcsr & PCSR_RLD)
            limit = s->pmr;
        else
            limit = 0xffff;
        ptimer_set_limit(s->timer, limit, 0);

        if (s->pcsr & PCSR_EN)
            ptimer_run(s->timer, 0);
        break;
    case 2:
        s->pmr = value;
        s->pcsr &= ~PCSR_PIF;
        if ((s->pcsr & PCSR_RLD) == 0) {
            if (s->pcsr & PCSR_OVW)
                ptimer_set_count(s->timer, value);
        } else {
            ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW);
        }
        break;
    case 4:
        break;
    default:
        /* Should never happen.  */
        abort();
    }
    m5208_timer_update(s);
}

static void m5208_timer_trigger(void *opaque)
{
    m5208_timer_state *s = (m5208_timer_state *)opaque;
    s->pcsr |= PCSR_PIF;
    m5208_timer_update(s);
}

typedef struct {
    m5208_timer_state timer[2];
} m5208_sys_state;

static uint32_t m5208_sys_read(void *opaque, target_phys_addr_t addr)
{
    m5208_sys_state *s = (m5208_sys_state *)opaque;
    switch (addr) {
    /* PIT0 */
    case 0xfc080000:
        return s->timer[0].pcsr;
    case 0xfc080002:
        return s->timer[0].pmr;
    case 0xfc080004:
        return ptimer_get_count(s->timer[0].timer);
    /* PIT1 */
    case 0xfc084000:
        return s->timer[1].pcsr;
    case 0xfc084002:
        return s->timer[1].pmr;
    case 0xfc084004:
        return ptimer_get_count(s->timer[1].timer);

    /* SDRAM Controller.  */
    case 0xfc0a8110: /* SDCS0 */
        {
            int n;
            for (n = 0; n < 32; n++) {
                if (ram_size < (2u << n))
                    break;
            }
            return (n - 1)  | 0x40000000;
        }
    case 0xfc0a8114: /* SDCS1 */
        return 0;

    default:
        cpu_abort(cpu_single_env, "m5208_sys_read: Bad offset 0x%x\n",
                  (int)addr);
        return 0;
    }
}

static void m5208_sys_write(void *opaque, target_phys_addr_t addr,
                            uint32_t value)
{
    m5208_sys_state *s = (m5208_sys_state *)opaque;
    switch (addr) {
    /* PIT0 */
    case 0xfc080000:
    case 0xfc080002:
    case 0xfc080004:
        m5208_timer_write(&s->timer[0], addr & 0xf, value);
        return;
    /* PIT1 */
    case 0xfc084000:
    case 0xfc084002:
    case 0xfc084004:
        m5208_timer_write(&s->timer[1], addr & 0xf, value);
        return;
    default:
        cpu_abort(cpu_single_env, "m5208_sys_write: Bad offset 0x%x\n",
                  (int)addr);
        break;
    }
}

static CPUReadMemoryFunc *m5208_sys_readfn[] = {
   m5208_sys_read,
   m5208_sys_read,
   m5208_sys_read
};

static CPUWriteMemoryFunc *m5208_sys_writefn[] = {
   m5208_sys_write,
   m5208_sys_write,
   m5208_sys_write
};

static void mcf5208_sys_init(qemu_irq *pic)
{
    int iomemtype;
    m5208_sys_state *s;
    QEMUBH *bh;
    int i;

    s = (m5208_sys_state *)qemu_mallocz(sizeof(m5208_sys_state));
    iomemtype = cpu_register_io_memory(0, m5208_sys_readfn,
                                       m5208_sys_writefn, s);
    /* SDRAMC.  */
    cpu_register_physical_memory(0xfc0a8000, 0x00004000, iomemtype);
    /* Timers.  */
    for (i = 0; i < 2; i++) {
        bh = qemu_bh_new(m5208_timer_trigger, &s->timer[i]);
        s->timer[i].timer = ptimer_init(bh);
        cpu_register_physical_memory(0xfc080000 + 0x4000 * i, 0x00004000,
                                     iomemtype);
        s->timer[i].irq = pic[4 + i];
    }
}

static void mcf5208evb_init(int ram_size, int vga_ram_size,
                     const char *boot_device, DisplayState *ds,
                     const char **fd_filename, int snapshot,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
{
    CPUState *env;
    int kernel_size;
    uint64_t elf_entry;
    target_ulong entry;
    qemu_irq *pic;

    if (!cpu_model)
        cpu_model = "m5208";
    env = cpu_init(cpu_model);
    if (!env) {
        fprintf(stderr, "Unable to find m68k CPU definition\n");
        exit(1);
    }

    /* Initialize CPU registers.  */
    env->vbr = 0;
    /* TODO: Configure BARs.  */

    /* DRAM at 0x20000000 */
    cpu_register_physical_memory(0x40000000, ram_size,
        qemu_ram_alloc(ram_size) | IO_MEM_RAM);

    /* Internal SRAM.  */
    cpu_register_physical_memory(0x80000000, 16384,
        qemu_ram_alloc(16384) | IO_MEM_RAM);

    /* Internal peripherals.  */
    pic = mcf_intc_init(0xfc048000, env);

    mcf_uart_mm_init(0xfc060000, pic[26], serial_hds[0]);
    mcf_uart_mm_init(0xfc064000, pic[27], serial_hds[1]);
    mcf_uart_mm_init(0xfc068000, pic[28], serial_hds[2]);

    mcf5208_sys_init(pic);

    if (nb_nics > 1) {
        fprintf(stderr, "Too many NICs\n");
        exit(1);
    }
    if (nd_table[0].vlan) {
        if (nd_table[0].model == NULL
            || strcmp(nd_table[0].model, "mcf_fec") == 0) {
            mcf_fec_init(&nd_table[0], 0xfc030000, pic + 36);
        } else if (strcmp(nd_table[0].model, "?") == 0) {
            fprintf(stderr, "qemu: Supported NICs: mcf_fec\n");
            exit (1);
        } else {
            fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
            exit (1);
        }
    }

    /*  0xfc000000 SCM.  */
    /*  0xfc004000 XBS.  */
    /*  0xfc008000 FlexBus CS.  */
    /* 0xfc030000 FEC.  */
    /*  0xfc040000 SCM + Power management.  */
    /*  0xfc044000 eDMA.  */
    /* 0xfc048000 INTC.  */
    /*  0xfc058000 I2C.  */
    /*  0xfc05c000 QSPI.  */
    /* 0xfc060000 UART0.  */
    /* 0xfc064000 UART0.  */
    /* 0xfc068000 UART0.  */
    /*  0xfc070000 DMA timers.  */
    /* 0xfc080000 PIT0.  */
    /* 0xfc084000 PIT1.  */
    /*  0xfc088000 EPORT.  */
    /*  0xfc08c000 Watchdog.  */
    /*  0xfc090000 clock module.  */
    /*  0xfc0a0000 CCM + reset.  */
    /*  0xfc0a4000 GPIO.  */
    /* 0xfc0a8000 SDRAM controller.  */

    /* Load kernel.  */
    if (!kernel_filename) {
        fprintf(stderr, "Kernel image must be specified\n");
        exit(1);
    }

    kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
    entry = elf_entry;
    if (kernel_size < 0) {
        kernel_size = load_uboot(kernel_filename, &entry, NULL);
    }
    if (kernel_size < 0) {
        kernel_size = load_image(kernel_filename, phys_ram_base);
        entry = 0x20000000;
    }
    if (kernel_size < 0) {
        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
        exit(1);
    }

    env->pc = entry;
}

QEMUMachine mcf5208evb_machine = {
    "mcf5208evb",
    "MCF5206EVB",
    mcf5208evb_init,
};
Commit	Line	Data
5fafdf24	1	/*
20dcee94 PB	2	* Motorola ColdFire MCF5208 SoC emulation.
	3	*
	4	* Copyright (c) 2007 CodeSourcery.
	5	*
	6	* This code is licenced under the GPL
	7	*/
87ecb68b PB	8	#include "hw.h"
	9	#include "mcf.h"
	10	#include "qemu-timer.h"
	11	#include "sysemu.h"
	12	#include "net.h"
	13	#include "boards.h"
20dcee94 PB	14
	15	#define SYS_FREQ 66000000
	16
	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
	26
	27	typedef struct {
	28	qemu_irq irq;
	29	ptimer_state *timer;
	30	uint16_t pcsr;
	31	uint16_t pmr;
	32	uint16_t pcntr;
	33	} m5208_timer_state;
	34
	35	static void m5208_timer_update(m5208_timer_state *s)
	36	{
	37	if ((s->pcsr & (PCSR_PIE \| PCSR_PIF)) == (PCSR_PIE \| PCSR_PIF))
	38	qemu_irq_raise(s->irq);
	39	else
	40	qemu_irq_lower(s->irq);
	41	}
	42
	43	static void m5208_timer_write(m5208_timer_state *s, int offset,
	44	uint32_t value)
	45	{
	46	int prescale;
	47	int limit;
	48	switch (offset) {
	49	case 0:
	50	/* The PIF bit is set-to-clear. */
	51	if (value & PCSR_PIF) {
	52	s->pcsr &= ~PCSR_PIF;
	53	value &= ~PCSR_PIF;
	54	}
	55	/* Avoid frobbing the timer if we're just twiddling IRQ bits. */
	56	if (((s->pcsr ^ value) & ~PCSR_PIE) == 0) {
	57	s->pcsr = value;
	58	m5208_timer_update(s);
	59	return;
	60	}
	61
	62	if (s->pcsr & PCSR_EN)
	63	ptimer_stop(s->timer);
	64
	65	s->pcsr = value;
	66
	67	prescale = 1 << ((s->pcsr & PCSR_PRE_MASK) >> PCSR_PRE_SHIFT);
	68	ptimer_set_freq(s->timer, (SYS_FREQ / 2) / prescale);
	69	if (s->pcsr & PCSR_RLD)
20dcee94	70	limit = s->pmr;
6d9db39c PB	71	else
6d9db39c PB	72	limit = 0xffff;
20dcee94 PB	73	ptimer_set_limit(s->timer, limit, 0);
	74
	75	if (s->pcsr & PCSR_EN)
	76	ptimer_run(s->timer, 0);
	77	break;
	78	case 2:
	79	s->pmr = value;
	80	s->pcsr &= ~PCSR_PIF;
6d9db39c PB	81	if ((s->pcsr & PCSR_RLD) == 0) {
	82	if (s->pcsr & PCSR_OVW)
	83	ptimer_set_count(s->timer, value);
	84	} else {
	85	ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW);
	86	}
20dcee94 PB	87	break;
	88	case 4:
	89	break;
	90	default:
	91	/* Should never happen. */
	92	abort();
	93	}
	94	m5208_timer_update(s);
	95	}
	96
	97	static void m5208_timer_trigger(void *opaque)
	98	{
	99	m5208_timer_state s = (m5208_timer_state )opaque;
	100	s->pcsr \|= PCSR_PIF;
	101	m5208_timer_update(s);
	102	}
	103
	104	typedef struct {
	105	m5208_timer_state timer[2];
	106	} m5208_sys_state;
	107
	108	static uint32_t m5208_sys_read(void *opaque, target_phys_addr_t addr)
	109	{
	110	m5208_sys_state s = (m5208_sys_state )opaque;
	111	switch (addr) {
	112	/* PIT0 */
	113	case 0xfc080000:
	114	return s->timer[0].pcsr;
	115	case 0xfc080002:
	116	return s->timer[0].pmr;
	117	case 0xfc080004:
	118	return ptimer_get_count(s->timer[0].timer);
	119	/* PIT1 */
	120	case 0xfc084000:
	121	return s->timer[1].pcsr;
	122	case 0xfc084002:
	123	return s->timer[1].pmr;
	124	case 0xfc084004:
	125	return ptimer_get_count(s->timer[1].timer);
	126
	127	/* SDRAM Controller. */
	128	case 0xfc0a8110: /* SDCS0 */
	129	{
	130	int n;
	131	for (n = 0; n < 32; n++) {
	132	if (ram_size < (2u << n))
	133	break;
	134	}
	135	return (n - 1) \| 0x40000000;
	136	}
	137	case 0xfc0a8114: /* SDCS1 */
	138	return 0;
	139
	140	default:
	141	cpu_abort(cpu_single_env, "m5208_sys_read: Bad offset 0x%x\n",
	142	(int)addr);
	143	return 0;
	144	}
	145	}
	146
	147	static void m5208_sys_write(void *opaque, target_phys_addr_t addr,
	148	uint32_t value)
	149	{
	150	m5208_sys_state s = (m5208_sys_state )opaque;
151	switch (addr) {
152	/* PIT0 */
153	case 0xfc080000:
154	case 0xfc080002:
155	case 0xfc080004:
156	m5208_timer_write(&s->timer[0], addr & 0xf, value);
157	return;
158	/* PIT1 */
159	case 0xfc084000:
160	case 0xfc084002:
161	case 0xfc084004:
162	m5208_timer_write(&s->timer[1], addr & 0xf, value);
163	return;
164	default:
165	cpu_abort(cpu_single_env, "m5208_sys_write: Bad offset 0x%x\n",
166	(int)addr);
167	break;
168	}
169	}
170
171	static CPUReadMemoryFunc *m5208_sys_readfn[] = {
172	m5208_sys_read,
173	m5208_sys_read,
174	m5208_sys_read
175	};
176
177	static CPUWriteMemoryFunc *m5208_sys_writefn[] = {
178	m5208_sys_write,
179	m5208_sys_write,
180	m5208_sys_write
181	};
182
183	static void mcf5208_sys_init(qemu_irq *pic)
184	{
185	int iomemtype;
186	m5208_sys_state *s;
187	QEMUBH *bh;
188	int i;
189
190	s = (m5208_sys_state *)qemu_mallocz(sizeof(m5208_sys_state));
191	iomemtype = cpu_register_io_memory(0, m5208_sys_readfn,
192	m5208_sys_writefn, s);
193	/* SDRAMC. */
194	cpu_register_physical_memory(0xfc0a8000, 0x00004000, iomemtype);
195	/* Timers. */
196	for (i = 0; i < 2; i++) {
197	bh = qemu_bh_new(m5208_timer_trigger, &s->timer[i]);
198	s->timer[i].timer = ptimer_init(bh);
199	cpu_register_physical_memory(0xfc080000 + 0x4000 * i, 0x00004000,
200	iomemtype);
201	s->timer[i].irq = pic[4 + i];
202	}
203	}
204
6ac0e82d AZ	205	static void mcf5208evb_init(int ram_size, int vga_ram_size,
	206	const char boot_device, DisplayState ds,
	207	const char **fd_filename, int snapshot,
20dcee94 PB	208	const char kernel_filename, const char kernel_cmdline,
	209	const char initrd_filename, const char cpu_model)
	210	{
	211	CPUState *env;
	212	int kernel_size;
	213	uint64_t elf_entry;
	214	target_ulong entry;
	215	qemu_irq *pic;
	216
20dcee94 PB	217	if (!cpu_model)
20dcee94 PB	218	cpu_model = "m5208";
aaed909a FB	219	env = cpu_init(cpu_model);
	220	if (!env) {
	221	fprintf(stderr, "Unable to find m68k CPU definition\n");
	222	exit(1);
20dcee94 PB	223	}
	224
	225	/* Initialize CPU registers. */
	226	env->vbr = 0;
	227	/* TODO: Configure BARs. */
	228
	229	/* DRAM at 0x20000000 */
	230	cpu_register_physical_memory(0x40000000, ram_size,
	231	qemu_ram_alloc(ram_size) \| IO_MEM_RAM);
	232
	233	/* Internal SRAM. */
	234	cpu_register_physical_memory(0x80000000, 16384,
	235	qemu_ram_alloc(16384) \| IO_MEM_RAM);
	236
	237	/* Internal peripherals. */
	238	pic = mcf_intc_init(0xfc048000, env);
	239
	240	mcf_uart_mm_init(0xfc060000, pic[26], serial_hds[0]);
	241	mcf_uart_mm_init(0xfc064000, pic[27], serial_hds[1]);
	242	mcf_uart_mm_init(0xfc068000, pic[28], serial_hds[2]);
	243
	244	mcf5208_sys_init(pic);
	245
7e049b8a PB	246	if (nb_nics > 1) {
	247	fprintf(stderr, "Too many NICs\n");
	248	exit(1);
	249	}
	250	if (nd_table[0].vlan) {
	251	if (nd_table[0].model == NULL
	252	\|\| strcmp(nd_table[0].model, "mcf_fec") == 0) {
	253	mcf_fec_init(&nd_table[0], 0xfc030000, pic + 36);
	254	} else if (strcmp(nd_table[0].model, "?") == 0) {
	255	fprintf(stderr, "qemu: Supported NICs: mcf_fec\n");
	256	exit (1);
	257	} else {
	258	fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
	259	exit (1);
	260	}
	261	}
	262
20dcee94 PB	263	/* 0xfc000000 SCM. */
	264	/* 0xfc004000 XBS. */
	265	/* 0xfc008000 FlexBus CS. */
7e049b8a	266	/* 0xfc030000 FEC. */
20dcee94 PB	267	/* 0xfc040000 SCM + Power management. */
	268	/* 0xfc044000 eDMA. */
	269	/* 0xfc048000 INTC. */
	270	/* 0xfc058000 I2C. */
	271	/* 0xfc05c000 QSPI. */
	272	/* 0xfc060000 UART0. */
	273	/* 0xfc064000 UART0. */
	274	/* 0xfc068000 UART0. */
	275	/* 0xfc070000 DMA timers. */
	276	/* 0xfc080000 PIT0. */
	277	/* 0xfc084000 PIT1. */
	278	/* 0xfc088000 EPORT. */
	279	/* 0xfc08c000 Watchdog. */
	280	/* 0xfc090000 clock module. */
	281	/* 0xfc0a0000 CCM + reset. */
	282	/* 0xfc0a4000 GPIO. */
	283	/* 0xfc0a8000 SDRAM controller. */
	284
	285	/* Load kernel. */
	286	if (!kernel_filename) {
	287	fprintf(stderr, "Kernel image must be specified\n");
	288	exit(1);
	289	}
	290
	291	kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
	292	entry = elf_entry;
	293	if (kernel_size < 0) {
	294	kernel_size = load_uboot(kernel_filename, &entry, NULL);
	295	}
	296	if (kernel_size < 0) {
	297	kernel_size = load_image(kernel_filename, phys_ram_base);
	298	entry = 0x20000000;
	299	}
	300	if (kernel_size < 0) {
	301	fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
	302	exit(1);
	303	}
	304
	305	env->pc = entry;
	306	}
	307
	308	QEMUMachine mcf5208evb_machine = {
	309	"mcf5208evb",
	310	"MCF5206EVB",
	311	mcf5208evb_init,
	312	};