 9951133e46
			
		
	
	
		9951133e46
		
	
	
	
	
		
			
			Changes in commit 533eb415df2e ("arm/aspeed: actually check RAM size")
introduced a 'valid_ram_sizes' array which can be used to compute the
associated bit field value encoding the RAM size. The field is simply
the index of the array.
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-Id: <20200819100956.2216690-19-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
		
	
			
		
			
				
	
	
		
			523 lines
		
	
	
		
			15 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			523 lines
		
	
	
		
			15 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
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|  * ASPEED SDRAM Memory Controller
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|  *
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|  * Copyright (C) 2016 IBM Corp.
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|  *
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|  * This code is licensed under the GPL version 2 or later.  See
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|  * the COPYING file in the top-level directory.
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|  */
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| 
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| #include "qemu/osdep.h"
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| #include "qemu/log.h"
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| #include "qemu/module.h"
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| #include "qemu/error-report.h"
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| #include "hw/misc/aspeed_sdmc.h"
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| #include "hw/misc/aspeed_scu.h"
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| #include "hw/qdev-properties.h"
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| #include "migration/vmstate.h"
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| #include "qapi/error.h"
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| #include "trace.h"
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| #include "qemu/units.h"
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| #include "qemu/cutils.h"
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| #include "qapi/visitor.h"
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| 
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| /* Protection Key Register */
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| #define R_PROT            (0x00 / 4)
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| #define   PROT_UNLOCKED      0x01
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| #define   PROT_HARDLOCKED    0x10  /* AST2600 */
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| #define   PROT_SOFTLOCKED    0x00
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| 
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| #define   PROT_KEY_UNLOCK     0xFC600309
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| #define   PROT_KEY_HARDLOCK   0xDEADDEAD /* AST2600 */
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| 
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| /* Configuration Register */
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| #define R_CONF            (0x04 / 4)
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| 
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| /* Interrupt control/status */
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| #define R_ISR             (0x50 / 4)
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| 
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| /* Control/Status Register #1 (ast2500) */
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| #define R_STATUS1         (0x60 / 4)
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| #define   PHY_BUSY_STATE      BIT(0)
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| #define   PHY_PLL_LOCK_STATUS BIT(4)
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| 
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| /* Reserved */
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| #define R_MCR6C           (0x6c / 4)
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| 
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| #define R_ECC_TEST_CTRL   (0x70 / 4)
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| #define   ECC_TEST_FINISHED   BIT(12)
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| #define   ECC_TEST_FAIL       BIT(13)
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| 
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| #define R_TEST_START_LEN  (0x74 / 4)
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| #define R_TEST_FAIL_DQ    (0x78 / 4)
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| #define R_TEST_INIT_VAL   (0x7c / 4)
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| #define R_DRAM_SW         (0x88 / 4)
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| #define R_DRAM_TIME       (0x8c / 4)
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| #define R_ECC_ERR_INJECT  (0xb4 / 4)
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| 
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| /*
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|  * Configuration register Ox4 (for Aspeed AST2400 SOC)
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|  *
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|  * These are for the record and future use. ASPEED_SDMC_DRAM_SIZE is
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|  * what we care about right now as it is checked by U-Boot to
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|  * determine the RAM size.
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|  */
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| 
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| #define ASPEED_SDMC_RESERVED            0xFFFFF800 /* 31:11 reserved */
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| #define ASPEED_SDMC_AST2300_COMPAT      (1 << 10)
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| #define ASPEED_SDMC_SCRAMBLE_PATTERN    (1 << 9)
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| #define ASPEED_SDMC_DATA_SCRAMBLE       (1 << 8)
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| #define ASPEED_SDMC_ECC_ENABLE          (1 << 7)
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| #define ASPEED_SDMC_VGA_COMPAT          (1 << 6) /* readonly */
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| #define ASPEED_SDMC_DRAM_BANK           (1 << 5)
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| #define ASPEED_SDMC_DRAM_BURST          (1 << 4)
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| #define ASPEED_SDMC_VGA_APERTURE(x)     ((x & 0x3) << 2) /* readonly */
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| #define     ASPEED_SDMC_VGA_8MB             0x0
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| #define     ASPEED_SDMC_VGA_16MB            0x1
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| #define     ASPEED_SDMC_VGA_32MB            0x2
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| #define     ASPEED_SDMC_VGA_64MB            0x3
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| #define ASPEED_SDMC_DRAM_SIZE(x)        (x & 0x3)
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| #define     ASPEED_SDMC_DRAM_64MB           0x0
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| #define     ASPEED_SDMC_DRAM_128MB          0x1
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| #define     ASPEED_SDMC_DRAM_256MB          0x2
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| #define     ASPEED_SDMC_DRAM_512MB          0x3
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| 
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| #define ASPEED_SDMC_READONLY_MASK                       \
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|     (ASPEED_SDMC_RESERVED | ASPEED_SDMC_VGA_COMPAT |    \
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|      ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))
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| /*
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|  * Configuration register Ox4 (for Aspeed AST2500 SOC and higher)
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|  *
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|  * Incompatibilities are annotated in the list. ASPEED_SDMC_HW_VERSION
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|  * should be set to 1 for the AST2500 SOC.
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|  */
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| #define ASPEED_SDMC_HW_VERSION(x)       ((x & 0xf) << 28) /* readonly */
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| #define ASPEED_SDMC_SW_VERSION          ((x & 0xff) << 20)
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| #define ASPEED_SDMC_CACHE_INITIAL_DONE  (1 << 19)  /* readonly */
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| #define ASPEED_SDMC_AST2500_RESERVED    0x7C000 /* 18:14 reserved */
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| #define ASPEED_SDMC_CACHE_DDR4_CONF     (1 << 13)
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| #define ASPEED_SDMC_CACHE_INITIAL       (1 << 12)
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| #define ASPEED_SDMC_CACHE_RANGE_CTRL    (1 << 11)
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| #define ASPEED_SDMC_CACHE_ENABLE        (1 << 10) /* differs from AST2400 */
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| #define ASPEED_SDMC_DRAM_TYPE           (1 << 4)  /* differs from AST2400 */
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| 
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| /* DRAM size definitions differs */
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| #define     ASPEED_SDMC_AST2500_128MB       0x0
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| #define     ASPEED_SDMC_AST2500_256MB       0x1
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| #define     ASPEED_SDMC_AST2500_512MB       0x2
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| #define     ASPEED_SDMC_AST2500_1024MB      0x3
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| 
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| #define     ASPEED_SDMC_AST2600_256MB       0x0
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| #define     ASPEED_SDMC_AST2600_512MB       0x1
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| #define     ASPEED_SDMC_AST2600_1024MB      0x2
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| #define     ASPEED_SDMC_AST2600_2048MB      0x3
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| 
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| #define ASPEED_SDMC_AST2500_READONLY_MASK                               \
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|     (ASPEED_SDMC_HW_VERSION(0xf) | ASPEED_SDMC_CACHE_INITIAL_DONE |     \
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|      ASPEED_SDMC_AST2500_RESERVED | ASPEED_SDMC_VGA_COMPAT |            \
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|      ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))
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| 
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| static uint64_t aspeed_sdmc_read(void *opaque, hwaddr addr, unsigned size)
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| {
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|     AspeedSDMCState *s = ASPEED_SDMC(opaque);
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| 
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|     addr >>= 2;
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| 
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|     if (addr >= ARRAY_SIZE(s->regs)) {
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|         qemu_log_mask(LOG_GUEST_ERROR,
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|                       "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
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|                       __func__, addr * 4);
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|         return 0;
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|     }
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| 
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|     return s->regs[addr];
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| }
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| 
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| static void aspeed_sdmc_write(void *opaque, hwaddr addr, uint64_t data,
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|                              unsigned int size)
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| {
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|     AspeedSDMCState *s = ASPEED_SDMC(opaque);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
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| 
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|     addr >>= 2;
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| 
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|     if (addr >= ARRAY_SIZE(s->regs)) {
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|         qemu_log_mask(LOG_GUEST_ERROR,
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|                       "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
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|                       __func__, addr);
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|         return;
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|     }
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| 
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|     asc->write(s, addr, data);
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| }
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| 
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| static const MemoryRegionOps aspeed_sdmc_ops = {
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|     .read = aspeed_sdmc_read,
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|     .write = aspeed_sdmc_write,
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|     .endianness = DEVICE_LITTLE_ENDIAN,
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|     .valid.min_access_size = 4,
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|     .valid.max_access_size = 4,
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| };
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| 
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| static void aspeed_sdmc_reset(DeviceState *dev)
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| {
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|     AspeedSDMCState *s = ASPEED_SDMC(dev);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
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| 
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|     memset(s->regs, 0, sizeof(s->regs));
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| 
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|     /* Set ram size bit and defaults values */
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|     s->regs[R_CONF] = asc->compute_conf(s, 0);
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| 
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|     /*
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|      * PHY status:
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|      *  - set phy status ok (set bit 1)
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|      *  - initial PVT calibration ok (clear bit 3)
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|      *  - runtime calibration ok (clear bit 5)
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|      */
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|     s->regs[0x100] = BIT(1);
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| 
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|     /* PHY eye window: set all as passing */
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|     s->regs[0x100 | (0x68 / 4)] = 0xff;
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|     s->regs[0x100 | (0x7c / 4)] = 0xff;
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|     s->regs[0x100 | (0x50 / 4)] = 0xfffffff;
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| }
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| 
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| static void aspeed_sdmc_get_ram_size(Object *obj, Visitor *v, const char *name,
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|                                      void *opaque, Error **errp)
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| {
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|     AspeedSDMCState *s = ASPEED_SDMC(obj);
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|     int64_t value = s->ram_size;
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| 
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|     visit_type_int(v, name, &value, errp);
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| }
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| 
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| static void aspeed_sdmc_set_ram_size(Object *obj, Visitor *v, const char *name,
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|                                      void *opaque, Error **errp)
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| {
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|     int i;
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|     char *sz;
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|     int64_t value;
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|     AspeedSDMCState *s = ASPEED_SDMC(obj);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
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| 
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|     if (!visit_type_int(v, name, &value, errp)) {
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|         return;
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|     }
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| 
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|     for (i = 0; asc->valid_ram_sizes[i]; i++) {
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|         if (value == asc->valid_ram_sizes[i]) {
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|             s->ram_size = value;
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|             return;
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|         }
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|     }
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| 
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|     sz = size_to_str(value);
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|     error_setg(errp, "Invalid RAM size %s", sz);
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|     g_free(sz);
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| }
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| 
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| static void aspeed_sdmc_initfn(Object *obj)
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| {
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|     object_property_add(obj, "ram-size", "int",
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|                         aspeed_sdmc_get_ram_size, aspeed_sdmc_set_ram_size,
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|                         NULL, NULL);
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| }
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| 
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| static void aspeed_sdmc_realize(DeviceState *dev, Error **errp)
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| {
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|     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
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|     AspeedSDMCState *s = ASPEED_SDMC(dev);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
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| 
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|     assert(asc->max_ram_size < 4 * GiB); /* 32-bit address bus */
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|     s->max_ram_size = asc->max_ram_size;
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| 
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|     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_sdmc_ops, s,
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|                           TYPE_ASPEED_SDMC, 0x1000);
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|     sysbus_init_mmio(sbd, &s->iomem);
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| }
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| 
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| static const VMStateDescription vmstate_aspeed_sdmc = {
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|     .name = "aspeed.sdmc",
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|     .version_id = 1,
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|     .minimum_version_id = 1,
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|     .fields = (VMStateField[]) {
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|         VMSTATE_UINT32_ARRAY(regs, AspeedSDMCState, ASPEED_SDMC_NR_REGS),
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|         VMSTATE_END_OF_LIST()
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|     }
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| };
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| 
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| static Property aspeed_sdmc_properties[] = {
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|     DEFINE_PROP_UINT64("max-ram-size", AspeedSDMCState, max_ram_size, 0),
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|     DEFINE_PROP_END_OF_LIST(),
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| };
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| 
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| static void aspeed_sdmc_class_init(ObjectClass *klass, void *data)
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| {
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|     DeviceClass *dc = DEVICE_CLASS(klass);
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|     dc->realize = aspeed_sdmc_realize;
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|     dc->reset = aspeed_sdmc_reset;
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|     dc->desc = "ASPEED SDRAM Memory Controller";
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|     dc->vmsd = &vmstate_aspeed_sdmc;
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|     device_class_set_props(dc, aspeed_sdmc_properties);
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| }
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| 
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| static const TypeInfo aspeed_sdmc_info = {
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|     .name = TYPE_ASPEED_SDMC,
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|     .parent = TYPE_SYS_BUS_DEVICE,
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|     .instance_size = sizeof(AspeedSDMCState),
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|     .instance_init = aspeed_sdmc_initfn,
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|     .class_init = aspeed_sdmc_class_init,
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|     .class_size = sizeof(AspeedSDMCClass),
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|     .abstract   = true,
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| };
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| 
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| static int aspeed_sdmc_get_ram_bits(AspeedSDMCState *s)
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| {
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|     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
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|     int i;
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| 
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|     /*
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|      * The bitfield value encoding the RAM size is the index of the
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|      * possible RAM size array
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|      */
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|     for (i = 0; asc->valid_ram_sizes[i]; i++) {
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|         if (s->ram_size == asc->valid_ram_sizes[i]) {
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|             return i;
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|         }
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|     }
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| 
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|     /*
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|      * Invalid RAM sizes should have been excluded when setting the
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|      * SoC RAM size.
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|      */
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|     g_assert_not_reached();
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| }
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| 
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| static uint32_t aspeed_2400_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
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| {
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|     uint32_t fixed_conf = ASPEED_SDMC_VGA_COMPAT |
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|         ASPEED_SDMC_DRAM_SIZE(aspeed_sdmc_get_ram_bits(s));
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| 
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|     /* Make sure readonly bits are kept */
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|     data &= ~ASPEED_SDMC_READONLY_MASK;
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| 
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|     return data | fixed_conf;
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| }
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| 
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| static void aspeed_2400_sdmc_write(AspeedSDMCState *s, uint32_t reg,
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|                                    uint32_t data)
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| {
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|     if (reg == R_PROT) {
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|         s->regs[reg] = (data == PROT_KEY_UNLOCK) ? PROT_UNLOCKED : PROT_SOFTLOCKED;
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|         return;
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|     }
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| 
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|     if (!s->regs[R_PROT]) {
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|         qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
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|         return;
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|     }
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| 
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|     switch (reg) {
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|     case R_CONF:
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|         data = aspeed_2400_sdmc_compute_conf(s, data);
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|         break;
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|     default:
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|         break;
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|     }
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| 
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|     s->regs[reg] = data;
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| }
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| 
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| static const uint64_t
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| aspeed_2400_ram_sizes[] = { 64 * MiB, 128 * MiB, 256 * MiB, 512 * MiB, 0};
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| 
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| static void aspeed_2400_sdmc_class_init(ObjectClass *klass, void *data)
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| {
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|     DeviceClass *dc = DEVICE_CLASS(klass);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
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| 
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|     dc->desc = "ASPEED 2400 SDRAM Memory Controller";
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|     asc->max_ram_size = 512 * MiB;
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|     asc->compute_conf = aspeed_2400_sdmc_compute_conf;
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|     asc->write = aspeed_2400_sdmc_write;
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|     asc->valid_ram_sizes = aspeed_2400_ram_sizes;
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| }
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| 
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| static const TypeInfo aspeed_2400_sdmc_info = {
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|     .name = TYPE_ASPEED_2400_SDMC,
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|     .parent = TYPE_ASPEED_SDMC,
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|     .class_init = aspeed_2400_sdmc_class_init,
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| };
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| 
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| static uint32_t aspeed_2500_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
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| {
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|     uint32_t fixed_conf = ASPEED_SDMC_HW_VERSION(1) |
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|         ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) |
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|         ASPEED_SDMC_CACHE_INITIAL_DONE |
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|         ASPEED_SDMC_DRAM_SIZE(aspeed_sdmc_get_ram_bits(s));
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| 
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|     /* Make sure readonly bits are kept */
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|     data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;
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| 
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|     return data | fixed_conf;
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| }
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| 
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| static void aspeed_2500_sdmc_write(AspeedSDMCState *s, uint32_t reg,
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|                                    uint32_t data)
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| {
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|     if (reg == R_PROT) {
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|         s->regs[reg] = (data == PROT_KEY_UNLOCK) ? PROT_UNLOCKED : PROT_SOFTLOCKED;
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|         return;
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|     }
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| 
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|     if (!s->regs[R_PROT]) {
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|         qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
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|         return;
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|     }
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| 
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|     switch (reg) {
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|     case R_CONF:
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|         data = aspeed_2500_sdmc_compute_conf(s, data);
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|         break;
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|     case R_STATUS1:
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|         /* Will never return 'busy' */
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|         data &= ~PHY_BUSY_STATE;
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|         break;
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|     case R_ECC_TEST_CTRL:
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|         /* Always done, always happy */
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|         data |= ECC_TEST_FINISHED;
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|         data &= ~ECC_TEST_FAIL;
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|         break;
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|     default:
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|         break;
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|     }
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| 
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|     s->regs[reg] = data;
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| }
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| 
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| static const uint64_t
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| aspeed_2500_ram_sizes[] = { 128 * MiB, 256 * MiB, 512 * MiB, 1024 * MiB, 0};
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| 
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| static void aspeed_2500_sdmc_class_init(ObjectClass *klass, void *data)
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| {
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|     DeviceClass *dc = DEVICE_CLASS(klass);
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|     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
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| 
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|     dc->desc = "ASPEED 2500 SDRAM Memory Controller";
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|     asc->max_ram_size = 1 * GiB;
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|     asc->compute_conf = aspeed_2500_sdmc_compute_conf;
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|     asc->write = aspeed_2500_sdmc_write;
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|     asc->valid_ram_sizes = aspeed_2500_ram_sizes;
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| }
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| 
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| static const TypeInfo aspeed_2500_sdmc_info = {
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|     .name = TYPE_ASPEED_2500_SDMC,
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|     .parent = TYPE_ASPEED_SDMC,
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|     .class_init = aspeed_2500_sdmc_class_init,
 | |
| };
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| 
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| static uint32_t aspeed_2600_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
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| {
 | |
|     uint32_t fixed_conf = ASPEED_SDMC_HW_VERSION(3) |
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|         ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) |
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|         ASPEED_SDMC_DRAM_SIZE(aspeed_sdmc_get_ram_bits(s));
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| 
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|     /* Make sure readonly bits are kept (use ast2500 mask) */
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|     data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;
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| 
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|     return data | fixed_conf;
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| }
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| 
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| static void aspeed_2600_sdmc_write(AspeedSDMCState *s, uint32_t reg,
 | |
|                                    uint32_t data)
 | |
| {
 | |
|     /* Unprotected registers */
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|     switch (reg) {
 | |
|     case R_ISR:
 | |
|     case R_MCR6C:
 | |
|     case R_TEST_START_LEN:
 | |
|     case R_TEST_FAIL_DQ:
 | |
|     case R_TEST_INIT_VAL:
 | |
|     case R_DRAM_SW:
 | |
|     case R_DRAM_TIME:
 | |
|     case R_ECC_ERR_INJECT:
 | |
|         s->regs[reg] = data;
 | |
|         return;
 | |
|     }
 | |
| 
 | |
|     if (s->regs[R_PROT] == PROT_HARDLOCKED) {
 | |
|         qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked until system reset!\n",
 | |
|                 __func__);
 | |
|         return;
 | |
|     }
 | |
| 
 | |
|     if (reg != R_PROT && s->regs[R_PROT] == PROT_SOFTLOCKED) {
 | |
|         qemu_log_mask(LOG_GUEST_ERROR,
 | |
|                       "%s: SDMC is locked! (write to MCR%02x blocked)\n",
 | |
|                       __func__, reg * 4);
 | |
|         return;
 | |
|     }
 | |
| 
 | |
|     switch (reg) {
 | |
|     case R_PROT:
 | |
|         if (data == PROT_KEY_UNLOCK)  {
 | |
|             data = PROT_UNLOCKED;
 | |
|         } else if (data == PROT_KEY_HARDLOCK) {
 | |
|             data = PROT_HARDLOCKED;
 | |
|         } else {
 | |
|             data = PROT_SOFTLOCKED;
 | |
|         }
 | |
|         break;
 | |
|     case R_CONF:
 | |
|         data = aspeed_2600_sdmc_compute_conf(s, data);
 | |
|         break;
 | |
|     case R_STATUS1:
 | |
|         /* Will never return 'busy'. 'lock status' is always set */
 | |
|         data &= ~PHY_BUSY_STATE;
 | |
|         data |= PHY_PLL_LOCK_STATUS;
 | |
|         break;
 | |
|     case R_ECC_TEST_CTRL:
 | |
|         /* Always done, always happy */
 | |
|         data |= ECC_TEST_FINISHED;
 | |
|         data &= ~ECC_TEST_FAIL;
 | |
|         break;
 | |
|     default:
 | |
|         break;
 | |
|     }
 | |
| 
 | |
|     s->regs[reg] = data;
 | |
| }
 | |
| 
 | |
| static const uint64_t
 | |
| aspeed_2600_ram_sizes[] = { 256 * MiB, 512 * MiB, 1024 * MiB, 2048 * MiB, 0};
 | |
| 
 | |
| static void aspeed_2600_sdmc_class_init(ObjectClass *klass, void *data)
 | |
| {
 | |
|     DeviceClass *dc = DEVICE_CLASS(klass);
 | |
|     AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);
 | |
| 
 | |
|     dc->desc = "ASPEED 2600 SDRAM Memory Controller";
 | |
|     asc->max_ram_size = 2 * GiB;
 | |
|     asc->compute_conf = aspeed_2600_sdmc_compute_conf;
 | |
|     asc->write = aspeed_2600_sdmc_write;
 | |
|     asc->valid_ram_sizes = aspeed_2600_ram_sizes;
 | |
| }
 | |
| 
 | |
| static const TypeInfo aspeed_2600_sdmc_info = {
 | |
|     .name = TYPE_ASPEED_2600_SDMC,
 | |
|     .parent = TYPE_ASPEED_SDMC,
 | |
|     .class_init = aspeed_2600_sdmc_class_init,
 | |
| };
 | |
| 
 | |
| static void aspeed_sdmc_register_types(void)
 | |
| {
 | |
|     type_register_static(&aspeed_sdmc_info);
 | |
|     type_register_static(&aspeed_2400_sdmc_info);
 | |
|     type_register_static(&aspeed_2500_sdmc_info);
 | |
|     type_register_static(&aspeed_2600_sdmc_info);
 | |
| }
 | |
| 
 | |
| type_init(aspeed_sdmc_register_types);
 |