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memory mapped NVRAM (Jocelyn Mayer) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@953 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-06-21 16:49:53 +00:00
parent 1ade1de223
commit e1bb04f740
2 changed files with 97 additions and 2 deletions
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96
hw/m48t59.c
View File

@ -35,6 +35,8 @@
struct m48t59_t {
/* Hardware parameters */
int IRQ;
int mem_index;
uint32_t mem_base;
uint32_t io_base;
uint16_t size;
/* RTC management */
@ -481,8 +483,95 @@ static uint32_t NVRAM_readb (void *opaque, uint32_t addr)
return retval;
}
static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
{
m48t59_t *NVRAM = opaque;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0)
NVRAM->buffer[addr] = value;
}
static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
{
m48t59_t *NVRAM = opaque;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0) {
NVRAM->buffer[addr] = value >> 8;
NVRAM->buffer[addr + 1] = value;
}
}
static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
m48t59_t *NVRAM = opaque;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0) {
NVRAM->buffer[addr] = value >> 24;
NVRAM->buffer[addr + 1] = value >> 16;
NVRAM->buffer[addr + 2] = value >> 8;
NVRAM->buffer[addr + 3] = value;
}
}
static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
{
m48t59_t *NVRAM = opaque;
uint32_t retval = 0;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0)
retval = NVRAM->buffer[addr];
return retval;
}
static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
{
m48t59_t *NVRAM = opaque;
uint32_t retval = 0;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0) {
retval = NVRAM->buffer[addr] << 8;
retval |= NVRAM->buffer[addr + 1];
}
return retval;
}
static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
{
m48t59_t *NVRAM = opaque;
uint32_t retval = 0;
addr -= NVRAM->mem_base;
if (addr < 0x1FF0) {
retval = NVRAM->buffer[addr] << 24;
retval |= NVRAM->buffer[addr + 1] << 16;
retval |= NVRAM->buffer[addr + 2] << 8;
retval |= NVRAM->buffer[addr + 3];
}
return retval;
}
static CPUWriteMemoryFunc *nvram_write[] = {
&nvram_writeb,
&nvram_writew,
&nvram_writel,
};
static CPUReadMemoryFunc *nvram_read[] = {
&nvram_readb,
&nvram_readw,
&nvram_readl,
};
/* Initialisation routine */
m48t59_t *m48t59_init (int IRQ, uint32_t io_base, uint16_t size)
m48t59_t *m48t59_init (int IRQ, uint32_t mem_base,
uint32_t io_base, uint16_t size)
{
m48t59_t *s;
@ -496,10 +585,15 @@ m48t59_t *m48t59_init (int IRQ, uint32_t io_base, uint16_t size)
}
s->IRQ = IRQ;
s->size = size;
s->mem_base = mem_base;
s->io_base = io_base;
s->addr = 0;
register_ioport_read(io_base, 0x04, 1, NVRAM_readb, s);
register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, s);
if (mem_base != 0) {
s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);
cpu_register_physical_memory(mem_base, 0x4000, s->mem_index);
}
s->alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, s);
s->wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, s);
s->lock = 0;

3
hw/m48t59.h
View File

@ -7,6 +7,7 @@ void m48t59_write (m48t59_t *NVRAM, uint32_t val);
uint32_t m48t59_read (m48t59_t *NVRAM);
void m48t59_set_addr (m48t59_t *NVRAM, uint32_t addr);
void m48t59_toggle_lock (m48t59_t *NVRAM, int lock);
m48t59_t *m48t59_init (int IRQ, uint32_t io_base, uint16_t size);
m48t59_t *m48t59_init (int IRQ, uint32_t io_base,
uint32_t mem_base, uint16_t size);
#endif /* !defined (__M48T59_H__) */