745 lines
19 KiB
C
745 lines
19 KiB
C
/*
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* QEMU JAZZ RC4030 chipset
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*
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* Copyright (c) 2007-2013 Hervé Poussineau
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/mips/mips.h"
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#include "hw/sysbus.h"
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#include "qemu/timer.h"
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#include "qemu/log.h"
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#include "exec/address-spaces.h"
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#include "trace.h"
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/********************************************************/
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/* rc4030 emulation */
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typedef struct dma_pagetable_entry {
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int32_t frame;
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int32_t owner;
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} QEMU_PACKED dma_pagetable_entry;
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#define DMA_PAGESIZE 4096
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#define DMA_REG_ENABLE 1
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#define DMA_REG_COUNT 2
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#define DMA_REG_ADDRESS 3
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#define DMA_FLAG_ENABLE 0x0001
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#define DMA_FLAG_MEM_TO_DEV 0x0002
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#define DMA_FLAG_TC_INTR 0x0100
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#define DMA_FLAG_MEM_INTR 0x0200
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#define DMA_FLAG_ADDR_INTR 0x0400
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#define TYPE_RC4030 "rc4030"
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#define RC4030(obj) \
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OBJECT_CHECK(rc4030State, (obj), TYPE_RC4030)
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#define TYPE_RC4030_IOMMU_MEMORY_REGION "rc4030-iommu-memory-region"
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typedef struct rc4030State
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{
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SysBusDevice parent;
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uint32_t config; /* 0x0000: RC4030 config register */
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uint32_t revision; /* 0x0008: RC4030 Revision register */
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uint32_t invalid_address_register; /* 0x0010: Invalid Address register */
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/* DMA */
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uint32_t dma_regs[8][4];
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uint32_t dma_tl_base; /* 0x0018: DMA transl. table base */
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uint32_t dma_tl_limit; /* 0x0020: DMA transl. table limit */
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/* cache */
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uint32_t cache_maint; /* 0x0030: Cache Maintenance */
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uint32_t remote_failed_address; /* 0x0038: Remote Failed Address */
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uint32_t memory_failed_address; /* 0x0040: Memory Failed Address */
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uint32_t cache_ptag; /* 0x0048: I/O Cache Physical Tag */
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uint32_t cache_ltag; /* 0x0050: I/O Cache Logical Tag */
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uint32_t cache_bmask; /* 0x0058: I/O Cache Byte Mask */
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uint32_t nmi_interrupt; /* 0x0200: interrupt source */
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uint32_t memory_refresh_rate; /* 0x0210: memory refresh rate */
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uint32_t nvram_protect; /* 0x0220: NV ram protect register */
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uint32_t rem_speed[16];
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uint32_t imr_jazz; /* Local bus int enable mask */
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uint32_t isr_jazz; /* Local bus int source */
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/* timer */
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QEMUTimer *periodic_timer;
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uint32_t itr; /* Interval timer reload */
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qemu_irq timer_irq;
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qemu_irq jazz_bus_irq;
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/* whole DMA memory region, root of DMA address space */
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IOMMUMemoryRegion dma_mr;
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AddressSpace dma_as;
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MemoryRegion iomem_chipset;
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MemoryRegion iomem_jazzio;
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} rc4030State;
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static void set_next_tick(rc4030State *s)
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{
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uint32_t tm_hz;
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qemu_irq_lower(s->timer_irq);
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tm_hz = 1000 / (s->itr + 1);
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timer_mod(s->periodic_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
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NANOSECONDS_PER_SECOND / tm_hz);
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}
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/* called for accesses to rc4030 */
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static uint64_t rc4030_read(void *opaque, hwaddr addr, unsigned int size)
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{
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rc4030State *s = opaque;
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uint32_t val;
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addr &= 0x3fff;
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switch (addr & ~0x3) {
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/* Global config register */
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case 0x0000:
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val = s->config;
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break;
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/* Revision register */
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case 0x0008:
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val = s->revision;
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break;
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/* Invalid Address register */
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case 0x0010:
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val = s->invalid_address_register;
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break;
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/* DMA transl. table base */
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case 0x0018:
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val = s->dma_tl_base;
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break;
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/* DMA transl. table limit */
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case 0x0020:
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val = s->dma_tl_limit;
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break;
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/* Remote Failed Address */
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case 0x0038:
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val = s->remote_failed_address;
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break;
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/* Memory Failed Address */
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case 0x0040:
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val = s->memory_failed_address;
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break;
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/* I/O Cache Byte Mask */
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case 0x0058:
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val = s->cache_bmask;
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/* HACK */
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if (s->cache_bmask == (uint32_t)-1)
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s->cache_bmask = 0;
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break;
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/* Remote Speed Registers */
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case 0x0070:
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case 0x0078:
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case 0x0080:
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case 0x0088:
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case 0x0090:
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case 0x0098:
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case 0x00a0:
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case 0x00a8:
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case 0x00b0:
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case 0x00b8:
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case 0x00c0:
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case 0x00c8:
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case 0x00d0:
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case 0x00d8:
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case 0x00e0:
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case 0x00e8:
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val = s->rem_speed[(addr - 0x0070) >> 3];
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break;
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/* DMA channel base address */
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case 0x0100:
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case 0x0108:
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case 0x0110:
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case 0x0118:
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case 0x0120:
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case 0x0128:
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case 0x0130:
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case 0x0138:
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case 0x0140:
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case 0x0148:
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case 0x0150:
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case 0x0158:
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case 0x0160:
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case 0x0168:
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case 0x0170:
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case 0x0178:
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case 0x0180:
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case 0x0188:
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case 0x0190:
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case 0x0198:
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case 0x01a0:
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case 0x01a8:
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case 0x01b0:
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case 0x01b8:
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case 0x01c0:
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case 0x01c8:
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case 0x01d0:
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case 0x01d8:
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case 0x01e0:
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case 0x01e8:
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case 0x01f0:
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case 0x01f8:
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{
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int entry = (addr - 0x0100) >> 5;
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int idx = (addr & 0x1f) >> 3;
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val = s->dma_regs[entry][idx];
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}
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break;
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/* Interrupt source */
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case 0x0200:
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val = s->nmi_interrupt;
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break;
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/* Error type */
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case 0x0208:
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val = 0;
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break;
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/* Memory refresh rate */
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case 0x0210:
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val = s->memory_refresh_rate;
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break;
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/* NV ram protect register */
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case 0x0220:
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val = s->nvram_protect;
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break;
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/* Interval timer count */
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case 0x0230:
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val = 0;
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qemu_irq_lower(s->timer_irq);
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break;
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/* EISA interrupt */
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case 0x0238:
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val = 7; /* FIXME: should be read from EISA controller */
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"rc4030: invalid read at 0x%x", (int)addr);
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val = 0;
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break;
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}
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if ((addr & ~3) != 0x230) {
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trace_rc4030_read(addr, val);
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}
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return val;
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}
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static void rc4030_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned int size)
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{
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rc4030State *s = opaque;
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uint32_t val = data;
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addr &= 0x3fff;
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trace_rc4030_write(addr, val);
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switch (addr & ~0x3) {
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/* Global config register */
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case 0x0000:
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s->config = val;
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break;
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/* DMA transl. table base */
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case 0x0018:
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s->dma_tl_base = val;
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break;
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/* DMA transl. table limit */
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case 0x0020:
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s->dma_tl_limit = val;
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break;
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/* DMA transl. table invalidated */
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case 0x0028:
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break;
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/* Cache Maintenance */
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case 0x0030:
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s->cache_maint = val;
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break;
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/* I/O Cache Physical Tag */
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case 0x0048:
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s->cache_ptag = val;
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break;
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/* I/O Cache Logical Tag */
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case 0x0050:
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s->cache_ltag = val;
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break;
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/* I/O Cache Byte Mask */
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case 0x0058:
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s->cache_bmask |= val; /* HACK */
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break;
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/* I/O Cache Buffer Window */
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case 0x0060:
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/* HACK */
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if (s->cache_ltag == 0x80000001 && s->cache_bmask == 0xf0f0f0f) {
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hwaddr dest = s->cache_ptag & ~0x1;
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dest += (s->cache_maint & 0x3) << 3;
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cpu_physical_memory_write(dest, &val, 4);
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}
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break;
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/* Remote Speed Registers */
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case 0x0070:
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case 0x0078:
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case 0x0080:
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case 0x0088:
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case 0x0090:
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case 0x0098:
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case 0x00a0:
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case 0x00a8:
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case 0x00b0:
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case 0x00b8:
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case 0x00c0:
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case 0x00c8:
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case 0x00d0:
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case 0x00d8:
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case 0x00e0:
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case 0x00e8:
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s->rem_speed[(addr - 0x0070) >> 3] = val;
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break;
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/* DMA channel base address */
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case 0x0100:
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case 0x0108:
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case 0x0110:
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case 0x0118:
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case 0x0120:
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case 0x0128:
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case 0x0130:
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case 0x0138:
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case 0x0140:
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case 0x0148:
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case 0x0150:
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case 0x0158:
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case 0x0160:
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case 0x0168:
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case 0x0170:
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case 0x0178:
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case 0x0180:
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case 0x0188:
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case 0x0190:
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case 0x0198:
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case 0x01a0:
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case 0x01a8:
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case 0x01b0:
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case 0x01b8:
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case 0x01c0:
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case 0x01c8:
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case 0x01d0:
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case 0x01d8:
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case 0x01e0:
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case 0x01e8:
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case 0x01f0:
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case 0x01f8:
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{
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int entry = (addr - 0x0100) >> 5;
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int idx = (addr & 0x1f) >> 3;
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s->dma_regs[entry][idx] = val;
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}
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break;
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/* Memory refresh rate */
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case 0x0210:
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s->memory_refresh_rate = val;
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break;
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/* Interval timer reload */
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case 0x0228:
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s->itr = val & 0x01FF;
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qemu_irq_lower(s->timer_irq);
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set_next_tick(s);
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break;
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/* EISA interrupt */
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case 0x0238:
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"rc4030: invalid write of 0x%02x at 0x%x",
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val, (int)addr);
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break;
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}
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}
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static const MemoryRegionOps rc4030_ops = {
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.read = rc4030_read,
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.write = rc4030_write,
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.impl.min_access_size = 4,
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.impl.max_access_size = 4,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static void update_jazz_irq(rc4030State *s)
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{
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uint16_t pending;
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pending = s->isr_jazz & s->imr_jazz;
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if (pending != 0)
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qemu_irq_raise(s->jazz_bus_irq);
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else
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qemu_irq_lower(s->jazz_bus_irq);
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}
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static void rc4030_irq_jazz_request(void *opaque, int irq, int level)
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{
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rc4030State *s = opaque;
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if (level) {
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s->isr_jazz |= 1 << irq;
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} else {
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s->isr_jazz &= ~(1 << irq);
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}
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update_jazz_irq(s);
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}
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static void rc4030_periodic_timer(void *opaque)
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{
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rc4030State *s = opaque;
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set_next_tick(s);
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qemu_irq_raise(s->timer_irq);
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}
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static uint64_t jazzio_read(void *opaque, hwaddr addr, unsigned int size)
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{
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rc4030State *s = opaque;
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uint32_t val;
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uint32_t irq;
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addr &= 0xfff;
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switch (addr) {
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/* Local bus int source */
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case 0x00: {
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uint32_t pending = s->isr_jazz & s->imr_jazz;
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val = 0;
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irq = 0;
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while (pending) {
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if (pending & 1) {
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val = (irq + 1) << 2;
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break;
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}
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irq++;
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pending >>= 1;
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}
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break;
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}
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/* Local bus int enable mask */
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case 0x02:
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val = s->imr_jazz;
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"rc4030/jazzio: invalid read at 0x%x", (int)addr);
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val = 0;
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break;
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}
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trace_jazzio_read(addr, val);
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return val;
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}
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static void jazzio_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned int size)
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{
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rc4030State *s = opaque;
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uint32_t val = data;
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addr &= 0xfff;
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trace_jazzio_write(addr, val);
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switch (addr) {
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/* Local bus int enable mask */
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case 0x02:
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s->imr_jazz = val;
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update_jazz_irq(s);
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR,
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"rc4030/jazzio: invalid write of 0x%02x at 0x%x",
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val, (int)addr);
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break;
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}
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}
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static const MemoryRegionOps jazzio_ops = {
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.read = jazzio_read,
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.write = jazzio_write,
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.impl.min_access_size = 2,
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.impl.max_access_size = 2,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static IOMMUTLBEntry rc4030_dma_translate(IOMMUMemoryRegion *iommu, hwaddr addr,
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IOMMUAccessFlags flag)
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{
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rc4030State *s = container_of(iommu, rc4030State, dma_mr);
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IOMMUTLBEntry ret = {
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.target_as = &address_space_memory,
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.iova = addr & ~(DMA_PAGESIZE - 1),
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.translated_addr = 0,
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.addr_mask = DMA_PAGESIZE - 1,
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.perm = IOMMU_NONE,
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};
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uint64_t i, entry_address;
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dma_pagetable_entry entry;
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i = addr / DMA_PAGESIZE;
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if (i < s->dma_tl_limit / sizeof(entry)) {
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entry_address = (s->dma_tl_base & 0x7fffffff) + i * sizeof(entry);
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if (address_space_read(ret.target_as, entry_address,
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MEMTXATTRS_UNSPECIFIED, (unsigned char *)&entry,
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sizeof(entry)) == MEMTX_OK) {
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ret.translated_addr = entry.frame & ~(DMA_PAGESIZE - 1);
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ret.perm = IOMMU_RW;
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}
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}
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return ret;
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}
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static void rc4030_reset(DeviceState *dev)
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{
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rc4030State *s = RC4030(dev);
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int i;
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s->config = 0x410; /* some boards seem to accept 0x104 too */
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s->revision = 1;
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s->invalid_address_register = 0;
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memset(s->dma_regs, 0, sizeof(s->dma_regs));
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s->remote_failed_address = s->memory_failed_address = 0;
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s->cache_maint = 0;
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s->cache_ptag = s->cache_ltag = 0;
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s->cache_bmask = 0;
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s->memory_refresh_rate = 0x18186;
|
|
s->nvram_protect = 7;
|
|
for (i = 0; i < 15; i++)
|
|
s->rem_speed[i] = 7;
|
|
s->imr_jazz = 0x10; /* XXX: required by firmware, but why? */
|
|
s->isr_jazz = 0;
|
|
|
|
s->itr = 0;
|
|
|
|
qemu_irq_lower(s->timer_irq);
|
|
qemu_irq_lower(s->jazz_bus_irq);
|
|
}
|
|
|
|
static int rc4030_post_load(void *opaque, int version_id)
|
|
{
|
|
rc4030State* s = opaque;
|
|
|
|
set_next_tick(s);
|
|
update_jazz_irq(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_rc4030 = {
|
|
.name = "rc4030",
|
|
.version_id = 3,
|
|
.post_load = rc4030_post_load,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_UINT32(config, rc4030State),
|
|
VMSTATE_UINT32(invalid_address_register, rc4030State),
|
|
VMSTATE_UINT32_2DARRAY(dma_regs, rc4030State, 8, 4),
|
|
VMSTATE_UINT32(dma_tl_base, rc4030State),
|
|
VMSTATE_UINT32(dma_tl_limit, rc4030State),
|
|
VMSTATE_UINT32(cache_maint, rc4030State),
|
|
VMSTATE_UINT32(remote_failed_address, rc4030State),
|
|
VMSTATE_UINT32(memory_failed_address, rc4030State),
|
|
VMSTATE_UINT32(cache_ptag, rc4030State),
|
|
VMSTATE_UINT32(cache_ltag, rc4030State),
|
|
VMSTATE_UINT32(cache_bmask, rc4030State),
|
|
VMSTATE_UINT32(memory_refresh_rate, rc4030State),
|
|
VMSTATE_UINT32(nvram_protect, rc4030State),
|
|
VMSTATE_UINT32_ARRAY(rem_speed, rc4030State, 16),
|
|
VMSTATE_UINT32(imr_jazz, rc4030State),
|
|
VMSTATE_UINT32(isr_jazz, rc4030State),
|
|
VMSTATE_UINT32(itr, rc4030State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void rc4030_do_dma(void *opaque, int n, uint8_t *buf, int len, int is_write)
|
|
{
|
|
rc4030State *s = opaque;
|
|
hwaddr dma_addr;
|
|
int dev_to_mem;
|
|
|
|
s->dma_regs[n][DMA_REG_ENABLE] &= ~(DMA_FLAG_TC_INTR | DMA_FLAG_MEM_INTR | DMA_FLAG_ADDR_INTR);
|
|
|
|
/* Check DMA channel consistency */
|
|
dev_to_mem = (s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_MEM_TO_DEV) ? 0 : 1;
|
|
if (!(s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_ENABLE) ||
|
|
(is_write != dev_to_mem)) {
|
|
s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
|
|
s->nmi_interrupt |= 1 << n;
|
|
return;
|
|
}
|
|
|
|
/* Get start address and len */
|
|
if (len > s->dma_regs[n][DMA_REG_COUNT])
|
|
len = s->dma_regs[n][DMA_REG_COUNT];
|
|
dma_addr = s->dma_regs[n][DMA_REG_ADDRESS];
|
|
|
|
/* Read/write data at right place */
|
|
address_space_rw(&s->dma_as, dma_addr, MEMTXATTRS_UNSPECIFIED,
|
|
buf, len, is_write);
|
|
|
|
s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_TC_INTR;
|
|
s->dma_regs[n][DMA_REG_COUNT] -= len;
|
|
}
|
|
|
|
struct rc4030DMAState {
|
|
void *opaque;
|
|
int n;
|
|
};
|
|
|
|
void rc4030_dma_read(void *dma, uint8_t *buf, int len)
|
|
{
|
|
rc4030_dma s = dma;
|
|
rc4030_do_dma(s->opaque, s->n, buf, len, 0);
|
|
}
|
|
|
|
void rc4030_dma_write(void *dma, uint8_t *buf, int len)
|
|
{
|
|
rc4030_dma s = dma;
|
|
rc4030_do_dma(s->opaque, s->n, buf, len, 1);
|
|
}
|
|
|
|
static rc4030_dma *rc4030_allocate_dmas(void *opaque, int n)
|
|
{
|
|
rc4030_dma *s;
|
|
struct rc4030DMAState *p;
|
|
int i;
|
|
|
|
s = (rc4030_dma *)g_malloc0(sizeof(rc4030_dma) * n);
|
|
p = (struct rc4030DMAState *)g_malloc0(sizeof(struct rc4030DMAState) * n);
|
|
for (i = 0; i < n; i++) {
|
|
p->opaque = opaque;
|
|
p->n = i;
|
|
s[i] = p;
|
|
p++;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static void rc4030_initfn(Object *obj)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
rc4030State *s = RC4030(obj);
|
|
SysBusDevice *sysbus = SYS_BUS_DEVICE(obj);
|
|
|
|
qdev_init_gpio_in(dev, rc4030_irq_jazz_request, 16);
|
|
|
|
sysbus_init_irq(sysbus, &s->timer_irq);
|
|
sysbus_init_irq(sysbus, &s->jazz_bus_irq);
|
|
|
|
sysbus_init_mmio(sysbus, &s->iomem_chipset);
|
|
sysbus_init_mmio(sysbus, &s->iomem_jazzio);
|
|
}
|
|
|
|
static void rc4030_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
rc4030State *s = RC4030(dev);
|
|
Object *o = OBJECT(dev);
|
|
|
|
s->periodic_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
|
|
rc4030_periodic_timer, s);
|
|
|
|
memory_region_init_io(&s->iomem_chipset, NULL, &rc4030_ops, s,
|
|
"rc4030.chipset", 0x300);
|
|
memory_region_init_io(&s->iomem_jazzio, NULL, &jazzio_ops, s,
|
|
"rc4030.jazzio", 0x00001000);
|
|
|
|
memory_region_init_iommu(&s->dma_mr, sizeof(s->dma_mr),
|
|
TYPE_RC4030_IOMMU_MEMORY_REGION,
|
|
o, "rc4030.dma", UINT32_MAX);
|
|
address_space_init(&s->dma_as, MEMORY_REGION(&s->dma_mr), "rc4030-dma");
|
|
}
|
|
|
|
static void rc4030_unrealize(DeviceState *dev, Error **errp)
|
|
{
|
|
rc4030State *s = RC4030(dev);
|
|
|
|
timer_free(s->periodic_timer);
|
|
|
|
address_space_destroy(&s->dma_as);
|
|
object_unparent(OBJECT(&s->dma_mr));
|
|
}
|
|
|
|
static void rc4030_class_init(ObjectClass *klass, void *class_data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->realize = rc4030_realize;
|
|
dc->unrealize = rc4030_unrealize;
|
|
dc->reset = rc4030_reset;
|
|
dc->vmsd = &vmstate_rc4030;
|
|
}
|
|
|
|
static const TypeInfo rc4030_info = {
|
|
.name = TYPE_RC4030,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(rc4030State),
|
|
.instance_init = rc4030_initfn,
|
|
.class_init = rc4030_class_init,
|
|
};
|
|
|
|
static void rc4030_iommu_memory_region_class_init(ObjectClass *klass,
|
|
void *data)
|
|
{
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
|
|
|
|
imrc->translate = rc4030_dma_translate;
|
|
}
|
|
|
|
static const TypeInfo rc4030_iommu_memory_region_info = {
|
|
.parent = TYPE_IOMMU_MEMORY_REGION,
|
|
.name = TYPE_RC4030_IOMMU_MEMORY_REGION,
|
|
.class_init = rc4030_iommu_memory_region_class_init,
|
|
};
|
|
|
|
static void rc4030_register_types(void)
|
|
{
|
|
type_register_static(&rc4030_info);
|
|
type_register_static(&rc4030_iommu_memory_region_info);
|
|
}
|
|
|
|
type_init(rc4030_register_types)
|
|
|
|
DeviceState *rc4030_init(rc4030_dma **dmas, IOMMUMemoryRegion **dma_mr)
|
|
{
|
|
DeviceState *dev;
|
|
|
|
dev = qdev_create(NULL, TYPE_RC4030);
|
|
qdev_init_nofail(dev);
|
|
|
|
*dmas = rc4030_allocate_dmas(dev, 4);
|
|
*dma_mr = &RC4030(dev)->dma_mr;
|
|
return dev;
|
|
}
|