Commit 4e9aec74 authored by pbrook's avatar pbrook
Browse files

Sparcf ESP dma fixes (Blue Swirl).


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1776 c046a42c-6fe2-441c-8c8c-71466251a162
parent 56b19403
/*
* QEMU ESP emulation
*
* Copyright (c) 2005 Fabrice Bellard
* Copyright (c) 2005-2006 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
......@@ -38,13 +38,18 @@ do { printf("ESP: set_irq(%d): %d\n", (irq), (level)); pic_set_irq((irq),(level)
#define ESPDMA_REGS 4
#define ESPDMA_MAXADDR (ESPDMA_REGS * 4 - 1)
#define ESP_MAXREG 0x3f
#define TI_BUFSZ 65536
#define TI_BUFSZ 1024*1024 // XXX
#define DMA_VER 0xa0000000
#define DMA_INTR 1
#define DMA_INTREN 0x10
#define DMA_LOADED 0x04000000
typedef struct ESPState ESPState;
typedef struct ESPState {
typedef int ESPDMAFunc(ESPState *s,
target_phys_addr_t phys_addr,
int transfer_size1);
struct ESPState {
BlockDriverState **bd;
uint8_t rregs[ESP_MAXREG];
uint8_t wregs[ESP_MAXREG];
......@@ -55,7 +60,10 @@ typedef struct ESPState {
int ti_dir;
uint8_t ti_buf[TI_BUFSZ];
int dma;
} ESPState;
ESPDMAFunc *dma_cb;
int64_t offset, len;
int target;
};
#define STAT_DO 0x00
#define STAT_DI 0x01
......@@ -217,6 +225,19 @@ static int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf,
return len;
}
static int esp_write_dma_cb(ESPState *s,
target_phys_addr_t phys_addr,
int transfer_size1)
{
DPRINTF("Write callback (offset %lld len %lld size %d trans_size %d)\n",
s->offset, s->len, s->ti_size, transfer_size1);
bdrv_write(s->bd[s->target], s->offset, s->ti_buf, s->len);
s->offset = 0;
s->len = 0;
s->target = 0;
return 0;
}
static void handle_satn(ESPState *s)
{
uint8_t buf[32];
......@@ -309,6 +330,9 @@ static void handle_satn(ESPState *s)
s->ti_size = len * 512;
}
DPRINTF("Read (10) (offset %lld len %lld)\n", offset, len);
if (s->ti_size > TI_BUFSZ) {
DPRINTF("size too large %d\n", s->ti_size);
}
bdrv_read(s->bd[target], offset, s->ti_buf, len);
// XXX error handling
s->ti_dir = 1;
......@@ -328,7 +352,13 @@ static void handle_satn(ESPState *s)
s->ti_size = len * 512;
}
DPRINTF("Write (10) (offset %lld len %lld)\n", offset, len);
bdrv_write(s->bd[target], offset, s->ti_buf, len);
if (s->ti_size > TI_BUFSZ) {
DPRINTF("size too large %d\n", s->ti_size);
}
s->dma_cb = esp_write_dma_cb;
s->offset = offset;
s->len = len;
s->target = target;
// XXX error handling
s->ti_dir = 0;
break;
......@@ -427,6 +457,10 @@ static void handle_ti(ESPState *s)
else
cpu_physical_memory_read(dmaptr, &s->ti_buf[i], 1);
}
if (s->dma_cb) {
s->dma_cb(s, s->espdmaregs[1], dmalen);
s->dma_cb = NULL;
}
s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
s->rregs[5] = INTR_BS;
s->rregs[6] = 0;
......@@ -444,8 +478,15 @@ static void esp_reset(void *opaque)
{
ESPState *s = opaque;
memset(s->rregs, 0, ESP_MAXREG);
memset(s->wregs, 0, ESP_MAXREG);
s->rregs[0x0e] = 0x4; // Indicate fas100a
memset(s->espdmaregs, 0, ESPDMA_REGS * 4);
s->ti_size = 0;
s->ti_rptr = 0;
s->ti_wptr = 0;
s->ti_dir = 0;
s->dma = 0;
s->dma_cb = NULL;
}
static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
......
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