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omap_gpmc: Refactor omap_gpmc_cs_map and omap_gpmc_cs_unmap

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Refactor the omap_gpmc_cs_map/unmap functions:
 * take the omap_gpmc_s* and a chipselect id rather than the
   omap_gpmc_cs_file_s*, so they have access to the general gpmc
   member fields
 * extract the base and mask from the config registers in the functions
   rather than at every callsite
 * check for CSVALID in the functions rather than at every callsite

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2011-08-28 16:22:18 +00:00
parent 07bc2f8077
commit 3387bf5581
1 changed files with 35 additions and 21 deletions
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56
hw/omap_gpmc.c
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@ -54,18 +54,25 @@ static void omap_gpmc_int_update(struct omap_gpmc_s *s)
qemu_set_irq(s->irq, s->irqen & s->irqst);
}
static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
static void omap_gpmc_cs_map(struct omap_gpmc_s *s, int cs)
{
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
uint32_t mask = (f->config[6] >> 8) & 0xf;
uint32_t base = f->config[6] & 0x3f;
uint32_t size;
if (!f->iomem) {
return;
}
if (!(f->config[6] & (1 << 6))) {
/* Do nothing unless CSVALID */
return;
}
/* TODO: check for overlapping regions and report access errors */
if ((mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf) ||
(base < 0 || base >= 0x40) ||
(base & 0x0f & ~mask)) {
(base & 0x0f & ~mask)) {
fprintf(stderr, "%s: wrong cs address mapping/decoding!\n",
__FUNCTION__);
return;
@ -83,8 +90,13 @@ static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
&f->container);
}
static void omap_gpmc_cs_unmap(struct omap_gpmc_cs_file_s *f)
static void omap_gpmc_cs_unmap(struct omap_gpmc_s *s, int cs)
{
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
if (!(f->config[6] & (1 << 6))) {
/* Do nothing unless CSVALID */
return;
}
if (!f->iomem) {
return;
}
@ -110,19 +122,26 @@ void omap_gpmc_reset(struct omap_gpmc_s *s)
s->preffifo = 0;
s->prefcount = 0;
for (i = 0; i < 8; i ++) {
if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_unmap(s->cs_file + i);
s->cs_file[i].config[0] = i ? 1 << 12 : 0;
omap_gpmc_cs_unmap(s, i);
s->cs_file[i].config[1] = 0x101001;
s->cs_file[i].config[2] = 0x020201;
s->cs_file[i].config[3] = 0x10031003;
s->cs_file[i].config[4] = 0x10f1111;
s->cs_file[i].config[5] = 0;
s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(&s->cs_file[i],
s->cs_file[i].config[6] & 0x1f, /* MASKADDR */
(s->cs_file[i].config[6] >> 8 & 0xf)); /* BASEADDR */
s->cs_file[i].config[6] = 0xf00;
/* In theory we could probe attached devices for some CFG1
* bits here, but we just retain them across resets as they
* were set initially by omap_gpmc_attach().
*/
if (i == 0) {
s->cs_file[i].config[0] &= 0x00433e00;
s->cs_file[i].config[6] |= 1 << 6; /* CSVALID */
omap_gpmc_cs_map(s, i);
} else {
s->cs_file[i].config[0] &= 0x00403c00;
}
}
s->ecc_cs = 0;
s->ecc_ptr = 0;
@ -311,13 +330,10 @@ static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
break;
case 0x78: /* GPMC_CONFIG7 */
if ((f->config[6] ^ value) & 0xf7f) {
if (f->config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_unmap(f);
if (value & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(f, value & 0x1f, /* MASKADDR */
(value >> 8 & 0xf)); /* BASEADDR */
omap_gpmc_cs_unmap(s, cs);
f->config[6] = value & 0x00000f7f;
omap_gpmc_cs_map(s, cs);
}
f->config[6] = value & 0x00000f7f;
break;
case 0x7c: /* GPMC_NAND_COMMAND */
case 0x80: /* GPMC_NAND_ADDRESS */
@ -407,9 +423,7 @@ void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem)
}
f = &s->cs_file[cs];
omap_gpmc_cs_unmap(s, cs);
f->iomem = iomem;
if (f->config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(f, f->config[6] & 0x1f, /* MASKADDR */
(f->config[6] >> 8 & 0xf)); /* BASEADDR */
omap_gpmc_cs_map(s, cs);
}