/*
* QEMU Sparc Sun4m ECC memory controller emulation
*
* Copyright (c) 2007 Robert Reif
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "sun4m.h"
#include "sysemu.h"
//#define DEBUG_ECC
#ifdef DEBUG_ECC
#define DPRINTF(fmt, args...) \
do { printf("ECC: " fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...)
#endif
/* There are 3 versions of this chip used in SMP sun4m systems:
* MCC (version 0, implementation 0) SS-600MP
* EMC (version 0, implementation 1) SS-10
* SMC (version 0, implementation 2) SS-10SX and SS-20
*/
#define ECC_MCC 0x00000000
#define ECC_EMC 0x10000000
#define ECC_SMC 0x20000000
/* Register indexes */
#define ECC_MER 0 /* Memory Enable Register */
#define ECC_MDR 1 /* Memory Delay Register */
#define ECC_MFSR 2 /* Memory Fault Status Register */
#define ECC_VCR 3 /* Video Configuration Register */
#define ECC_MFAR0 4 /* Memory Fault Address Register 0 */
#define ECC_MFAR1 5 /* Memory Fault Address Register 1 */
#define ECC_DR 6 /* Diagnostic Register */
#define ECC_ECR0 7 /* Event Count Register 0 */
#define ECC_ECR1 8 /* Event Count Register 1 */
/* ECC fault control register */
#define ECC_MER_EE 0x00000001 /* Enable ECC checking */
#define ECC_MER_EI 0x00000002 /* Enable Interrupts on
correctable errors */
#define ECC_MER_MRR0 0x00000004 /* SIMM 0 */
#define ECC_MER_MRR1 0x00000008 /* SIMM 1 */
#define ECC_MER_MRR2 0x00000010 /* SIMM 2 */
#define ECC_MER_MRR3 0x00000020 /* SIMM 3 */
#define ECC_MER_MRR4 0x00000040 /* SIMM 4 */
#define ECC_MER_MRR5 0x00000080 /* SIMM 5 */
#define ECC_MER_MRR6 0x00000100 /* SIMM 6 */
#define ECC_MER_MRR7 0x00000200 /* SIMM 7 */
#define ECC_MER_REU 0x00000100 /* Memory Refresh Enable (600MP) */
#define ECC_MER_MRR 0x000003fc /* MRR mask */
#define ECC_MER_A 0x00000400 /* Memory controller addr map select */
#define ECC_MER_DCI 0x00000800 /* Disables Coherent Invalidate ACK */
#define ECC_MER_VER 0x0f000000 /* Version */
#define ECC_MER_IMPL 0xf0000000 /* Implementation */
#define ECC_MER_MASK_0 0x00000103 /* Version 0 (MCC) mask */
#define ECC_MER_MASK_1 0x00000bff /* Version 1 (EMC) mask */
#define ECC_MER_MASK_2 0x00000bff /* Version 2 (SMC) mask */
/* ECC memory delay register */
#define ECC_MDR_RRI 0x000003ff /* Refresh Request Interval */
#define ECC_MDR_MI 0x00001c00 /* MIH Delay */
#define ECC_MDR_CI 0x0000e000 /* Coherent Invalidate Delay */
#define ECC_MDR_MDL 0x001f0000 /* MBus Master arbitration delay */
#define ECC_MDR_MDH 0x03e00000 /* MBus Master arbitration delay */
#define ECC_MDR_GAD 0x7c000000 /* Graphics Arbitration Delay */
#define ECC_MDR_RSC 0x80000000 /* Refresh load control */
#define ECC_MDR_MASK 0x7fffffff
/* ECC fault status register */
#define ECC_MFSR_CE 0x00000001 /* Correctable error */
#define ECC_MFSR_BS 0x00000002 /* C2 graphics bad slot access */
#define ECC_MFSR_TO 0x00000004 /* Timeout on write */
#define ECC_MFSR_UE 0x00000008 /* Uncorrectable error */
#define ECC_MFSR_DW 0x000000f0 /* Index of double word in block */
#define ECC_MFSR_SYND 0x0000ff00 /* Syndrome for correctable error */
#define ECC_MFSR_ME 0x00010000 /* Multiple errors */
#define ECC_MFSR_C2ERR 0x00020000 /* C2 graphics error */
/* ECC fault address register 0 */
#define ECC_MFAR0_PADDR 0x0000000f /* PA[32-35] */
#define ECC_MFAR0_TYPE 0x000000f0 /* Transaction type */
#define ECC_MFAR0_SIZE 0x00000700 /* Transaction size */
#define ECC_MFAR0_CACHE 0x00000800 /* Mapped cacheable */
#define ECC_MFAR0_LOCK 0x00001000 /* Error occurred in atomic cycle */
#define ECC_MFAR0_BMODE 0x00002000 /* Boot mode */
#define ECC_MFAR0_VADDR 0x003fc000 /* VA[12-19] (superset bits) */
#define ECC_MFAR0_S 0x08000000 /* Supervisor mode */
#define ECC_MFARO_MID 0xf0000000 /* Module ID */
/* ECC diagnostic register */
#define ECC_DR_CBX 0x00000001
#define ECC_DR_CB0 0x00000002
#define ECC_DR_CB1 0x00000004
#define ECC_DR_CB2 0x00000008
#define ECC_DR_CB4 0x00000010
#define ECC_DR_CB8 0x00000020
#define ECC_DR_CB16 0x00000040
#define ECC_DR_CB32 0x00000080
#define ECC_DR_DMODE 0x00000c00
#define ECC_NREGS 9
#define ECC_SIZE (ECC_NREGS * sizeof(uint32_t))
#define ECC_DIAG_SIZE 4
#define ECC_DIAG_MASK (ECC_DIAG_SIZE - 1)
typedef struct ECCState {
qemu_irq irq;
uint32_t regs[ECC_NREGS];
uint8_t diag[ECC_DIAG_SIZE];
uint32_t version;
} ECCState;
static void ecc_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
ECCState *s = opaque;
switch (addr >> 2) {
case ECC_MER:
if (s->version == ECC_MCC)
s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
else if (s->version == ECC_EMC)
s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
else if (s->version == ECC_SMC)
s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
DPRINTF("Write memory enable %08x\n", val);
break;
case ECC_MDR:
s->regs[ECC_MDR] = val & ECC_MDR_MASK;
DPRINTF("Write memory delay %08x\n", val);
break;
case ECC_MFSR:
s->regs[ECC_MFSR] = val;
qemu_irq_lower(s->irq);
DPRINTF("Write memory fault status %08x\n", val);
break;
case ECC_VCR:
s->regs[ECC_VCR] = val;
DPRINTF("Write slot configuration %08x\n", val);
break;
case ECC_DR:
s->regs[ECC_DR] = val;
DPRINTF("Write diagnostic %08x\n", val);
break;
case ECC_ECR0:
s->regs[ECC_ECR0] = val;
DPRINTF("Write event count 1 %08x\n", val);
break;
case ECC_ECR1:
s->regs[ECC_ECR0] = val;
DPRINTF("Write event count 2 %08x\n", val);
break;
}
}
static uint32_t ecc_mem_readl(void *opaque, target_phys_addr_t addr)
{
ECCState *s = opaque;
uint32_t ret = 0;
switch (addr >> 2) {
case ECC_MER:
ret = s->regs[ECC_MER];
DPRINTF("Read memory enable %08x\n", ret);
break;
case ECC_MDR:
ret = s->regs[ECC_MDR];
DPRINTF("Read memory delay %08x\n", ret);
break;
case ECC_MFSR:
ret = s->regs[ECC_MFSR];
DPRINTF("Read memory fault status %08x\n", ret);
break;
case ECC_VCR:
ret = s->regs[ECC_VCR];
DPRINTF("Read slot configuration %08x\n", ret);
break;
case ECC_MFAR0:
ret = s->regs[ECC_MFAR0];
DPRINTF("Read memory fault address 0 %08x\n", ret);
break;
case ECC_MFAR1:
ret = s->regs[ECC_MFAR1];
DPRINTF("Read memory fault address 1 %08x\n", ret);
break;
case ECC_DR:
ret = s->regs[ECC_DR];
DPRINTF("Read diagnostic %08x\n", ret);
break;
case ECC_ECR0:
ret = s->regs[ECC_ECR0];
DPRINTF("Read event count 1 %08x\n", ret);
break;
case ECC_ECR1:
ret = s->regs[ECC_ECR0];
DPRINTF("Read event count 2 %08x\n", ret);
break;
}
return ret;
}
static CPUReadMemoryFunc *ecc_mem_read[3] = {
NULL,
NULL,
ecc_mem_readl,
};
static CPUWriteMemoryFunc *ecc_mem_write[3] = {
NULL,
NULL,
ecc_mem_writel,
};
static void ecc_diag_mem_writeb(void *opaque, target_phys_addr_t addr,
uint32_t val)
{
ECCState *s = opaque;
DPRINTF("Write diagnostic[%d] = %02x\n", (int)addr, val);
s->diag[addr & ECC_DIAG_MASK] = val;
}
static uint32_t ecc_diag_mem_readb(void *opaque, target_phys_addr_t addr)
{
ECCState *s = opaque;
uint32_t ret = s->diag[(int)addr];
DPRINTF("Read diagnostic[%d] = %02x\n", (int)addr, ret);
return ret;
}
static CPUReadMemoryFunc *ecc_diag_mem_read[3] = {
ecc_diag_mem_readb,
NULL,
NULL,
};
static CPUWriteMemoryFunc *ecc_diag_mem_write[3] = {
ecc_diag_mem_writeb,
NULL,
NULL,
};
static int ecc_load(QEMUFile *f, void *opaque, int version_id)
{
ECCState *s = opaque;
int i;
if (version_id != 3)
return -EINVAL;
for (i = 0; i < ECC_NREGS; i++)
qemu_get_be32s(f, &s->regs[i]);
for (i = 0; i < ECC_DIAG_SIZE; i++)
qemu_get_8s(f, &s->diag[i]);
qemu_get_be32s(f, &s->version);
return 0;
}
static void ecc_save(QEMUFile *f, void *opaque)
{
ECCState *s = opaque;
int i;
for (i = 0; i < ECC_NREGS; i++)
qemu_put_be32s(f, &s->regs[i]);
for (i = 0; i < ECC_DIAG_SIZE; i++)
qemu_put_8s(f, &s->diag[i]);
qemu_put_be32s(f, &s->version);
}
static void ecc_reset(void *opaque)
{
ECCState *s = opaque;
if (s->version == ECC_MCC)
s->regs[ECC_MER] &= ECC_MER_REU;
else
s->regs[ECC_MER] &= (ECC_MER_VER | ECC_MER_IMPL | ECC_MER_MRR |
ECC_MER_DCI);
s->regs[ECC_MDR] = 0x20;
s->regs[ECC_MFSR] = 0;
s->regs[ECC_VCR] = 0;
s->regs[ECC_MFAR0] = 0x07c00000;
s->regs[ECC_MFAR1] = 0;
s->regs[ECC_DR] = 0;
s->regs[ECC_ECR0] = 0;
s->regs[ECC_ECR1] = 0;
}
void * ecc_init(target_phys_addr_t base, qemu_irq irq, uint32_t version)
{
int ecc_io_memory;
ECCState *s;
s = qemu_mallocz(sizeof(ECCState));
if (!s)
return NULL;
s->version = version;
s->regs[0] = version;
s->irq = irq;
ecc_io_memory = cpu_register_io_memory(0, ecc_mem_read, ecc_mem_write, s);
cpu_register_physical_memory(base, ECC_SIZE, ecc_io_memory);
if (version == ECC_MCC) { // SS-600MP only
ecc_io_memory = cpu_register_io_memory(0, ecc_diag_mem_read,
ecc_diag_mem_write, s);
cpu_register_physical_memory(base + 0x1000, ECC_DIAG_SIZE,
ecc_io_memory);
}
register_savevm("ECC", base, 3, ecc_save, ecc_load, s);
qemu_register_reset(ecc_reset, s);
ecc_reset(s);
return s;
}