From 67e999be93410b9eb7024d879d8e4cf6ce124eed Mon Sep 17 00:00:00 2001 From: bellard Date: Sun, 3 Sep 2006 16:09:07 +0000 Subject: Separate the DMA controllers - Convert ESP to new DMA methods (Blue Swirl) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2143 c046a42c-6fe2-441c-8c8c-71466251a162 --- hw/sparc32_dma.c | 249 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 249 insertions(+) create mode 100644 hw/sparc32_dma.c (limited to 'hw/sparc32_dma.c') diff --git a/hw/sparc32_dma.c b/hw/sparc32_dma.c new file mode 100644 index 0000000000..d8d7e6a83e --- /dev/null +++ b/hw/sparc32_dma.c @@ -0,0 +1,249 @@ +/* + * QEMU Sparc32 DMA controller emulation + * + * Copyright (c) 2006 Fabrice Bellard + * + * 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 "vl.h" + +/* debug DMA */ +//#define DEBUG_DMA + +/* + * This is the DMA controller part of chip STP2000 (Master I/O), also + * produced as NCR89C100. See + * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt + * and + * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/DMA2.txt + */ + +#ifdef DEBUG_DMA +#define DPRINTF(fmt, args...) \ +do { printf("DMA: " fmt , ##args); } while (0) +#define pic_set_irq_new(ctl, irq, level) \ + do { printf("DMA: set_irq(%d): %d\n", (irq), (level)); \ + pic_set_irq_new((ctl), (irq),(level));} while (0) +#else +#define DPRINTF(fmt, args...) +#endif + +#define DMA_REGS 8 +#define DMA_MAXADDR (DMA_REGS * 4 - 1) + +#define DMA_VER 0xa0000000 +#define DMA_INTR 1 +#define DMA_INTREN 0x10 +#define DMA_WRITE_MEM 0x100 +#define DMA_LOADED 0x04000000 +#define DMA_RESET 0x80 + +typedef struct DMAState DMAState; + +struct DMAState { + uint32_t dmaregs[DMA_REGS]; + int espirq, leirq; + void *iommu, *esp_opaque, *lance_opaque, *intctl; +}; + +void ledma_set_irq(void *opaque, int isr) +{ + DMAState *s = opaque; + + pic_set_irq_new(s->intctl, s->leirq, isr); +} + +void ledma_memory_read(void *opaque, target_phys_addr_t addr, uint8_t *buf, int len) +{ + DMAState *s = opaque; + + DPRINTF("DMA write, direction: %c, addr 0x%8.8x\n", + s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); + sparc_iommu_memory_read(s->iommu, addr | s->dmaregs[7], buf, len); +} + +void ledma_memory_write(void *opaque, target_phys_addr_t addr, uint8_t *buf, int len) +{ + DMAState *s = opaque; + + DPRINTF("DMA read, direction: %c, addr 0x%8.8x\n", + s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); + sparc_iommu_memory_write(s->iommu, addr | s->dmaregs[7], buf, len); +} + +void espdma_raise_irq(void *opaque) +{ + DMAState *s = opaque; + + s->dmaregs[0] |= DMA_INTR; + pic_set_irq_new(s->intctl, s->espirq, 1); +} + +void espdma_clear_irq(void *opaque) +{ + DMAState *s = opaque; + + s->dmaregs[0] &= ~DMA_INTR; + pic_set_irq_new(s->intctl, s->espirq, 0); +} + +void espdma_memory_read(void *opaque, uint8_t *buf, int len) +{ + DMAState *s = opaque; + + DPRINTF("DMA read, direction: %c, addr 0x%8.8x\n", + s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); + sparc_iommu_memory_read(s->iommu, s->dmaregs[1], buf, len); + s->dmaregs[0] |= DMA_INTR; + s->dmaregs[1] += len; +} + +void espdma_memory_write(void *opaque, uint8_t *buf, int len) +{ + DMAState *s = opaque; + + DPRINTF("DMA write, direction: %c, addr 0x%8.8x\n", + s->dmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->dmaregs[1]); + sparc_iommu_memory_write(s->iommu, s->dmaregs[1], buf, len); + s->dmaregs[0] |= DMA_INTR; + s->dmaregs[1] += len; +} + +static uint32_t dma_mem_readl(void *opaque, target_phys_addr_t addr) +{ + DMAState *s = opaque; + uint32_t saddr; + + saddr = (addr & DMA_MAXADDR) >> 2; + DPRINTF("read dmareg[%d]: 0x%8.8x\n", saddr, s->dmaregs[saddr]); + + return s->dmaregs[saddr]; +} + +static void dma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) +{ + DMAState *s = opaque; + uint32_t saddr; + + saddr = (addr & DMA_MAXADDR) >> 2; + DPRINTF("write dmareg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->dmaregs[saddr], val); + switch (saddr) { + case 0: + if (!(val & DMA_INTREN)) + pic_set_irq_new(s->intctl, s->espirq, 0); + if (val & DMA_RESET) { + esp_reset(s->esp_opaque); + } else if (val & 0x40) { + val &= ~0x40; + } else if (val == 0) + val = 0x40; + val &= 0x0fffffff; + val |= DMA_VER; + break; + case 1: + s->dmaregs[0] |= DMA_LOADED; + break; + case 4: + if (!(val & DMA_INTREN)) + pic_set_irq_new(s->intctl, s->leirq, 0); + if (val & DMA_RESET) + pcnet_h_reset(s->lance_opaque); + val &= 0x0fffffff; + val |= DMA_VER; + break; + default: + break; + } + s->dmaregs[saddr] = val; +} + +static CPUReadMemoryFunc *dma_mem_read[3] = { + dma_mem_readl, + dma_mem_readl, + dma_mem_readl, +}; + +static CPUWriteMemoryFunc *dma_mem_write[3] = { + dma_mem_writel, + dma_mem_writel, + dma_mem_writel, +}; + +static void dma_reset(void *opaque) +{ + DMAState *s = opaque; + + memset(s->dmaregs, 0, DMA_REGS * 4); + s->dmaregs[0] = DMA_VER; + s->dmaregs[4] = DMA_VER; +} + +static void dma_save(QEMUFile *f, void *opaque) +{ + DMAState *s = opaque; + unsigned int i; + + for (i = 0; i < DMA_REGS; i++) + qemu_put_be32s(f, &s->dmaregs[i]); +} + +static int dma_load(QEMUFile *f, void *opaque, int version_id) +{ + DMAState *s = opaque; + unsigned int i; + + if (version_id != 1) + return -EINVAL; + for (i = 0; i < DMA_REGS; i++) + qemu_get_be32s(f, &s->dmaregs[i]); + + return 0; +} + +void *sparc32_dma_init(uint32_t daddr, int espirq, int leirq, void *iommu, void *intctl) +{ + DMAState *s; + int dma_io_memory; + + s = qemu_mallocz(sizeof(DMAState)); + if (!s) + return NULL; + + s->espirq = espirq; + s->leirq = leirq; + s->iommu = iommu; + s->intctl = intctl; + + dma_io_memory = cpu_register_io_memory(0, dma_mem_read, dma_mem_write, s); + cpu_register_physical_memory(daddr, 16 * 2, dma_io_memory); + + register_savevm("sparc32_dma", daddr, 1, dma_save, dma_load, s); + qemu_register_reset(dma_reset, s); + + return s; +} + +void sparc32_dma_set_reset_data(void *opaque, void *esp_opaque, + void *lance_opaque) +{ + DMAState *s = opaque; + + s->esp_opaque = esp_opaque; + s->lance_opaque = lance_opaque; +} -- cgit v1.2.1