hw/misc/aspeed_sdmc.c - qemu - Git at Google

 /*
  * ASPEED SDRAM Memory Controller
  *
  * Copyright (C) 2016 IBM Corp.
  *
  * This code is licensed under the GPL version 2 or later.  See
  * the COPYING file in the top-level directory.
  */

 #include "qemu/osdep.h"
 #include "qemu/log.h"
 #include "qemu/error-report.h"
 #include "hw/misc/aspeed_sdmc.h"
 #include "hw/misc/aspeed_scu.h"
 #include "hw/qdev-properties.h"
 #include "qapi/error.h"
 #include "trace.h"

 /* Protection Key Register */
 #define R_PROT            (0x00 / 4)
 #define   PROT_KEY_UNLOCK     0xFC600309

 /* Configuration Register */
 #define R_CONF            (0x04 / 4)

 /*
  * Configuration register Ox4 (for Aspeed AST2400 SOC)
  *
  * These are for the record and future use. ASPEED_SDMC_DRAM_SIZE is
  * what we care about right now as it is checked by U-Boot to
  * determine the RAM size.
  */

 #define ASPEED_SDMC_RESERVED            0xFFFFF800 /* 31:11 reserved */
 #define ASPEED_SDMC_AST2300_COMPAT      (1 << 10)
 #define ASPEED_SDMC_SCRAMBLE_PATTERN    (1 << 9)
 #define ASPEED_SDMC_DATA_SCRAMBLE       (1 << 8)
 #define ASPEED_SDMC_ECC_ENABLE          (1 << 7)
 #define ASPEED_SDMC_VGA_COMPAT          (1 << 6) /* readonly */
 #define ASPEED_SDMC_DRAM_BANK           (1 << 5)
 #define ASPEED_SDMC_DRAM_BURST          (1 << 4)
 #define ASPEED_SDMC_VGA_APERTURE(x)     ((x & 0x3) << 2) /* readonly */
 #define     ASPEED_SDMC_VGA_8MB             0x0
 #define     ASPEED_SDMC_VGA_16MB            0x1
 #define     ASPEED_SDMC_VGA_32MB            0x2
 #define     ASPEED_SDMC_VGA_64MB            0x3
 #define ASPEED_SDMC_DRAM_SIZE(x)        (x & 0x3)
 #define     ASPEED_SDMC_DRAM_64MB           0x0
 #define     ASPEED_SDMC_DRAM_128MB          0x1
 #define     ASPEED_SDMC_DRAM_256MB          0x2
 #define     ASPEED_SDMC_DRAM_512MB          0x3

 #define ASPEED_SDMC_READONLY_MASK                       \
     (ASPEED_SDMC_RESERVED | ASPEED_SDMC_VGA_COMPAT |    \
      ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))
 /*
  * Configuration register Ox4 (for Aspeed AST2500 SOC and higher)
  *
  * Incompatibilities are annotated in the list. ASPEED_SDMC_HW_VERSION
  * should be set to 1 for the AST2500 SOC.
  */
 #define ASPEED_SDMC_HW_VERSION(x)       ((x & 0xf) << 28) /* readonly */
 #define ASPEED_SDMC_SW_VERSION          ((x & 0xff) << 20)
 #define ASPEED_SDMC_CACHE_INITIAL_DONE  (1 << 19)  /* readonly */
 #define ASPEED_SDMC_AST2500_RESERVED    0x7C000 /* 18:14 reserved */
 #define ASPEED_SDMC_CACHE_DDR4_CONF     (1 << 13)
 #define ASPEED_SDMC_CACHE_INITIAL       (1 << 12)
 #define ASPEED_SDMC_CACHE_RANGE_CTRL    (1 << 11)
 #define ASPEED_SDMC_CACHE_ENABLE        (1 << 10) /* differs from AST2400 */
 #define ASPEED_SDMC_DRAM_TYPE           (1 << 4)  /* differs from AST2400 */

 /* DRAM size definitions differs */
 #define     ASPEED_SDMC_AST2500_128MB       0x0
 #define     ASPEED_SDMC_AST2500_256MB       0x1
 #define     ASPEED_SDMC_AST2500_512MB       0x2
 #define     ASPEED_SDMC_AST2500_1024MB      0x3

 #define ASPEED_SDMC_AST2500_READONLY_MASK                               \
     (ASPEED_SDMC_HW_VERSION(0xf) | ASPEED_SDMC_CACHE_INITIAL_DONE |     \
      ASPEED_SDMC_AST2500_RESERVED | ASPEED_SDMC_VGA_COMPAT |            \
      ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))

 static uint64_t aspeed_sdmc_read(void *opaque, hwaddr addr, unsigned size)
 {
     AspeedSDMCState *s = ASPEED_SDMC(opaque);

     addr >>= 2;

     if (addr >= ARRAY_SIZE(s->regs)) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
                       __func__, addr);
         return 0;
     }

     return s->regs[addr];
 }

 static void aspeed_sdmc_write(void *opaque, hwaddr addr, uint64_t data,
                              unsigned int size)
 {
     AspeedSDMCState *s = ASPEED_SDMC(opaque);

     addr >>= 2;

     if (addr >= ARRAY_SIZE(s->regs)) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
                       __func__, addr);
         return;
     }

     if (addr != R_PROT && s->regs[R_PROT] != PROT_KEY_UNLOCK) {
         qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
         return;
     }

     if (addr == R_CONF) {
         /* Make sure readonly bits are kept */
         switch (s->silicon_rev) {
         case AST2400_A0_SILICON_REV:
             data &= ~ASPEED_SDMC_READONLY_MASK;
             break;
         case AST2500_A0_SILICON_REV:
             data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;
             break;
         default:
             g_assert_not_reached();
         }
     }

     s->regs[addr] = data;
 }

 static const MemoryRegionOps aspeed_sdmc_ops = {
     .read = aspeed_sdmc_read,
     .write = aspeed_sdmc_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
 };

 static int ast2400_rambits(AspeedSDMCState *s)
 {
     switch (s->ram_size >> 20) {
     case 64:
         return ASPEED_SDMC_DRAM_64MB;
     case 128:
         return ASPEED_SDMC_DRAM_128MB;
     case 256:
         return ASPEED_SDMC_DRAM_256MB;
     case 512:
         return ASPEED_SDMC_DRAM_512MB;
     default:
         break;
     }

     /* use a common default */
     error_report("warning: Invalid RAM size 0x%" PRIx64
                  ". Using default 256M", s->ram_size);
     s->ram_size = 256 << 20;
     return ASPEED_SDMC_DRAM_256MB;
 }

 static int ast2500_rambits(AspeedSDMCState *s)
 {
     switch (s->ram_size >> 20) {
     case 128:
         return ASPEED_SDMC_AST2500_128MB;
     case 256:
         return ASPEED_SDMC_AST2500_256MB;
     case 512:
         return ASPEED_SDMC_AST2500_512MB;
     case 1024:
         return ASPEED_SDMC_AST2500_1024MB;
     default:
         break;
     }

     /* use a common default */
     error_report("warning: Invalid RAM size 0x%" PRIx64
                  ". Using default 512M", s->ram_size);
     s->ram_size = 512 << 20;
     return ASPEED_SDMC_AST2500_512MB;
 }

 static void aspeed_sdmc_reset(DeviceState *dev)
 {
     AspeedSDMCState *s = ASPEED_SDMC(dev);

     memset(s->regs, 0, sizeof(s->regs));

     /* Set ram size bit and defaults values */
     switch (s->silicon_rev) {
     case AST2400_A0_SILICON_REV:
         s->regs[R_CONF] |=
             ASPEED_SDMC_VGA_COMPAT |
             ASPEED_SDMC_DRAM_SIZE(s->ram_bits);
         break;

     case AST2500_A0_SILICON_REV:
     case AST2500_A1_SILICON_REV:
         s->regs[R_CONF] |=
             ASPEED_SDMC_HW_VERSION(1) |
             ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) |
             ASPEED_SDMC_DRAM_SIZE(s->ram_bits);
         break;

     default:
         g_assert_not_reached();
     }
 }

 static void aspeed_sdmc_realize(DeviceState *dev, Error **errp)
 {
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     AspeedSDMCState *s = ASPEED_SDMC(dev);

     if (!is_supported_silicon_rev(s->silicon_rev)) {
         error_setg(errp, "Unknown silicon revision: 0x%" PRIx32,
                 s->silicon_rev);
         return;
     }

     switch (s->silicon_rev) {
     case AST2400_A0_SILICON_REV:
         s->ram_bits = ast2400_rambits(s);
         break;
     case AST2500_A0_SILICON_REV:
     case AST2500_A1_SILICON_REV:
         s->ram_bits = ast2500_rambits(s);
         break;
     default:
         g_assert_not_reached();
     }

     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_sdmc_ops, s,
                           TYPE_ASPEED_SDMC, 0x1000);
     sysbus_init_mmio(sbd, &s->iomem);
 }

 static const VMStateDescription vmstate_aspeed_sdmc = {
     .name = "aspeed.sdmc",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32_ARRAY(regs, AspeedSDMCState, ASPEED_SDMC_NR_REGS),
         VMSTATE_END_OF_LIST()
     }
 };

 static Property aspeed_sdmc_properties[] = {
     DEFINE_PROP_UINT32("silicon-rev", AspeedSDMCState, silicon_rev, 0),
     DEFINE_PROP_UINT64("ram-size", AspeedSDMCState, ram_size, 0),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void aspeed_sdmc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     dc->realize = aspeed_sdmc_realize;
     dc->reset = aspeed_sdmc_reset;
     dc->desc = "ASPEED SDRAM Memory Controller";
     dc->vmsd = &vmstate_aspeed_sdmc;
     dc->props = aspeed_sdmc_properties;
 }

 static const TypeInfo aspeed_sdmc_info = {
     .name = TYPE_ASPEED_SDMC,
     .parent = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(AspeedSDMCState),
     .class_init = aspeed_sdmc_class_init,
 };

 static void aspeed_sdmc_register_types(void)
 {
     type_register_static(&aspeed_sdmc_info);
 }

 type_init(aspeed_sdmc_register_types);
	/*
	* ASPEED SDRAM Memory Controller
	*
	* Copyright (C) 2016 IBM Corp.
	*
	* This code is licensed under the GPL version 2 or later. See
	* the COPYING file in the top-level directory.
	*/

	#include "qemu/osdep.h"
	#include "qemu/log.h"
	#include "qemu/error-report.h"
	#include "hw/misc/aspeed_sdmc.h"
	#include "hw/misc/aspeed_scu.h"
	#include "hw/qdev-properties.h"
	#include "qapi/error.h"
	#include "trace.h"

	/* Protection Key Register */
	#define R_PROT (0x00 / 4)
	#define PROT_KEY_UNLOCK 0xFC600309

	/* Configuration Register */
	#define R_CONF (0x04 / 4)

	/*
	* Configuration register Ox4 (for Aspeed AST2400 SOC)
	*
	* These are for the record and future use. ASPEED_SDMC_DRAM_SIZE is
	* what we care about right now as it is checked by U-Boot to
	* determine the RAM size.
	*/

	#define ASPEED_SDMC_RESERVED 0xFFFFF800 /* 31:11 reserved */
	#define ASPEED_SDMC_AST2300_COMPAT (1 << 10)
	#define ASPEED_SDMC_SCRAMBLE_PATTERN (1 << 9)
	#define ASPEED_SDMC_DATA_SCRAMBLE (1 << 8)
	#define ASPEED_SDMC_ECC_ENABLE (1 << 7)
	#define ASPEED_SDMC_VGA_COMPAT (1 << 6) /* readonly */
	#define ASPEED_SDMC_DRAM_BANK (1 << 5)
	#define ASPEED_SDMC_DRAM_BURST (1 << 4)
	#define ASPEED_SDMC_VGA_APERTURE(x) ((x & 0x3) << 2) /* readonly */
	#define ASPEED_SDMC_VGA_8MB 0x0
	#define ASPEED_SDMC_VGA_16MB 0x1
	#define ASPEED_SDMC_VGA_32MB 0x2
	#define ASPEED_SDMC_VGA_64MB 0x3
	#define ASPEED_SDMC_DRAM_SIZE(x) (x & 0x3)
	#define ASPEED_SDMC_DRAM_64MB 0x0
	#define ASPEED_SDMC_DRAM_128MB 0x1
	#define ASPEED_SDMC_DRAM_256MB 0x2
	#define ASPEED_SDMC_DRAM_512MB 0x3

	#define ASPEED_SDMC_READONLY_MASK \
	(ASPEED_SDMC_RESERVED \| ASPEED_SDMC_VGA_COMPAT \| \
	ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))
	/*
	* Configuration register Ox4 (for Aspeed AST2500 SOC and higher)
	*
	* Incompatibilities are annotated in the list. ASPEED_SDMC_HW_VERSION
	* should be set to 1 for the AST2500 SOC.
	*/
	#define ASPEED_SDMC_HW_VERSION(x) ((x & 0xf) << 28) /* readonly */
	#define ASPEED_SDMC_SW_VERSION ((x & 0xff) << 20)
	#define ASPEED_SDMC_CACHE_INITIAL_DONE (1 << 19) /* readonly */
	#define ASPEED_SDMC_AST2500_RESERVED 0x7C000 /* 18:14 reserved */
	#define ASPEED_SDMC_CACHE_DDR4_CONF (1 << 13)
	#define ASPEED_SDMC_CACHE_INITIAL (1 << 12)
	#define ASPEED_SDMC_CACHE_RANGE_CTRL (1 << 11)
	#define ASPEED_SDMC_CACHE_ENABLE (1 << 10) /* differs from AST2400 */
	#define ASPEED_SDMC_DRAM_TYPE (1 << 4) /* differs from AST2400 */

	/* DRAM size definitions differs */
	#define ASPEED_SDMC_AST2500_128MB 0x0
	#define ASPEED_SDMC_AST2500_256MB 0x1
	#define ASPEED_SDMC_AST2500_512MB 0x2
	#define ASPEED_SDMC_AST2500_1024MB 0x3

	#define ASPEED_SDMC_AST2500_READONLY_MASK \
	(ASPEED_SDMC_HW_VERSION(0xf) \| ASPEED_SDMC_CACHE_INITIAL_DONE \| \
	ASPEED_SDMC_AST2500_RESERVED \| ASPEED_SDMC_VGA_COMPAT \| \
	ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))

	static uint64_t aspeed_sdmc_read(void *opaque, hwaddr addr, unsigned size)
	{
	AspeedSDMCState *s = ASPEED_SDMC(opaque);

	addr >>= 2;

	if (addr >= ARRAY_SIZE(s->regs)) {
	qemu_log_mask(LOG_GUEST_ERROR,
	"%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
	__func__, addr);
	return 0;
	}

	return s->regs[addr];
	}

	static void aspeed_sdmc_write(void *opaque, hwaddr addr, uint64_t data,
	unsigned int size)
	{
	AspeedSDMCState *s = ASPEED_SDMC(opaque);

	addr >>= 2;

	if (addr >= ARRAY_SIZE(s->regs)) {
	qemu_log_mask(LOG_GUEST_ERROR,
	"%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
	__func__, addr);
	return;
	}

	if (addr != R_PROT && s->regs[R_PROT] != PROT_KEY_UNLOCK) {
	qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
	return;
	}

	if (addr == R_CONF) {
	/* Make sure readonly bits are kept */
	switch (s->silicon_rev) {
	case AST2400_A0_SILICON_REV:
	data &= ~ASPEED_SDMC_READONLY_MASK;
	break;
	case AST2500_A0_SILICON_REV:
	data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;
	break;
	default:
	g_assert_not_reached();
	}
	}

	s->regs[addr] = data;
	}

	static const MemoryRegionOps aspeed_sdmc_ops = {
	.read = aspeed_sdmc_read,
	.write = aspeed_sdmc_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.valid.min_access_size = 4,
	.valid.max_access_size = 4,
	};

	static int ast2400_rambits(AspeedSDMCState *s)
	{
	switch (s->ram_size >> 20) {
	case 64:
	return ASPEED_SDMC_DRAM_64MB;
	case 128:
	return ASPEED_SDMC_DRAM_128MB;
	case 256:
	return ASPEED_SDMC_DRAM_256MB;
	case 512:
	return ASPEED_SDMC_DRAM_512MB;
	default:
	break;
	}

	/* use a common default */
	error_report("warning: Invalid RAM size 0x%" PRIx64
	". Using default 256M", s->ram_size);
	s->ram_size = 256 << 20;
	return ASPEED_SDMC_DRAM_256MB;
	}

	static int ast2500_rambits(AspeedSDMCState *s)
	{
	switch (s->ram_size >> 20) {
	case 128:
	return ASPEED_SDMC_AST2500_128MB;
	case 256:
	return ASPEED_SDMC_AST2500_256MB;
	case 512:
	return ASPEED_SDMC_AST2500_512MB;
	case 1024:
	return ASPEED_SDMC_AST2500_1024MB;
	default:
	break;
	}

	/* use a common default */
	error_report("warning: Invalid RAM size 0x%" PRIx64
	". Using default 512M", s->ram_size);
	s->ram_size = 512 << 20;
	return ASPEED_SDMC_AST2500_512MB;
	}

	static void aspeed_sdmc_reset(DeviceState *dev)
	{
	AspeedSDMCState *s = ASPEED_SDMC(dev);

	memset(s->regs, 0, sizeof(s->regs));

	/* Set ram size bit and defaults values */
	switch (s->silicon_rev) {
	case AST2400_A0_SILICON_REV:
	s->regs[R_CONF] \|=
	ASPEED_SDMC_VGA_COMPAT \|
	ASPEED_SDMC_DRAM_SIZE(s->ram_bits);
	break;

	case AST2500_A0_SILICON_REV:
	case AST2500_A1_SILICON_REV:
	s->regs[R_CONF] \|=
	ASPEED_SDMC_HW_VERSION(1) \|
	ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) \|
	ASPEED_SDMC_DRAM_SIZE(s->ram_bits);
	break;

	default:
	g_assert_not_reached();
	}
	}

	static void aspeed_sdmc_realize(DeviceState dev, Error *errp)
	{
	SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
	AspeedSDMCState *s = ASPEED_SDMC(dev);

	if (!is_supported_silicon_rev(s->silicon_rev)) {
	error_setg(errp, "Unknown silicon revision: 0x%" PRIx32,
	s->silicon_rev);
	return;
	}

	switch (s->silicon_rev) {
	case AST2400_A0_SILICON_REV:
	s->ram_bits = ast2400_rambits(s);
	break;
	case AST2500_A0_SILICON_REV:
	case AST2500_A1_SILICON_REV:
	s->ram_bits = ast2500_rambits(s);
	break;
	default:
	g_assert_not_reached();
	}

	memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_sdmc_ops, s,
	TYPE_ASPEED_SDMC, 0x1000);
	sysbus_init_mmio(sbd, &s->iomem);
	}

	static const VMStateDescription vmstate_aspeed_sdmc = {
	.name = "aspeed.sdmc",
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32_ARRAY(regs, AspeedSDMCState, ASPEED_SDMC_NR_REGS),
	VMSTATE_END_OF_LIST()
	}
	};

	static Property aspeed_sdmc_properties[] = {
	DEFINE_PROP_UINT32("silicon-rev", AspeedSDMCState, silicon_rev, 0),
	DEFINE_PROP_UINT64("ram-size", AspeedSDMCState, ram_size, 0),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void aspeed_sdmc_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	dc->realize = aspeed_sdmc_realize;
	dc->reset = aspeed_sdmc_reset;
	dc->desc = "ASPEED SDRAM Memory Controller";
	dc->vmsd = &vmstate_aspeed_sdmc;
	dc->props = aspeed_sdmc_properties;
	}

	static const TypeInfo aspeed_sdmc_info = {
	.name = TYPE_ASPEED_SDMC,
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(AspeedSDMCState),
	.class_init = aspeed_sdmc_class_init,
	};

	static void aspeed_sdmc_register_types(void)
	{
	type_register_static(&aspeed_sdmc_info);
	}

	type_init(aspeed_sdmc_register_types);