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xilinx_spips: allow mmio execution 

This allows to execute from the lqspi area.

When the request_ptr is called the device loads 1024bytes from the SPI device.
Then this code can be executed by the guest.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
KONRAD Frederic 2016-10-20 11:09:53 +02:00 committed by Edgar E. Iglesias
parent c935674635
commit 252b99baeb
1 changed files with 54 additions and 18 deletions
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72
hw/ssi/xilinx_spips.c
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@ -496,6 +496,18 @@ static const MemoryRegionOps spips_ops = {
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void xilinx_qspips_invalidate_mmio_ptr(XilinxQSPIPS *q)
{
XilinxSPIPS *s = &q->parent_obj;
if (q->lqspi_cached_addr != ~0ULL) {
/* Invalidate the current mapped mmio */
memory_region_invalidate_mmio_ptr(&s->mmlqspi, q->lqspi_cached_addr,
LQSPI_CACHE_SIZE);
q->lqspi_cached_addr = ~0ULL;
}
}
static void xilinx_qspips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
@ -505,7 +517,7 @@ static void xilinx_qspips_write(void *opaque, hwaddr addr,
addr >>= 2;
if (addr == R_LQSPI_CFG) {
q->lqspi_cached_addr = ~0ULL;
xilinx_qspips_invalidate_mmio_ptr(q);
}
}
@ -517,27 +529,20 @@ static const MemoryRegionOps qspips_ops = {
#define LQSPI_CACHE_SIZE 1024
static uint64_t
lqspi_read(void *opaque, hwaddr addr, unsigned int size)
static void lqspi_load_cache(void *opaque, hwaddr addr)
{
int i;
XilinxQSPIPS *q = opaque;
XilinxSPIPS *s = opaque;
uint32_t ret;
if (addr >= q->lqspi_cached_addr &&
addr <= q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
uint8_t *retp = &q->lqspi_buf[addr - q->lqspi_cached_addr];
ret = cpu_to_le32(*(uint32_t *)retp);
DB_PRINT_L(1, "addr: %08x, data: %08x\n", (unsigned)addr,
(unsigned)ret);
return ret;
} else {
int flash_addr = (addr / num_effective_busses(s));
int slave = flash_addr >> LQSPI_ADDRESS_BITS;
int cache_entry = 0;
uint32_t u_page_save = s->regs[R_LQSPI_STS] & ~LQSPI_CFG_U_PAGE;
int i;
int flash_addr = ((addr & ~(LQSPI_CACHE_SIZE - 1))
/ num_effective_busses(s));
int slave = flash_addr >> LQSPI_ADDRESS_BITS;
int cache_entry = 0;
uint32_t u_page_save = s->regs[R_LQSPI_STS] & ~LQSPI_CFG_U_PAGE;
if (addr < q->lqspi_cached_addr ||
addr > q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
xilinx_qspips_invalidate_mmio_ptr(q);
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
s->regs[R_LQSPI_STS] |= slave ? LQSPI_CFG_U_PAGE : 0;
@ -589,12 +594,43 @@ lqspi_read(void *opaque, hwaddr addr, unsigned int size)
xilinx_spips_update_cs_lines(s);
q->lqspi_cached_addr = flash_addr * num_effective_busses(s);
}
}
static void *lqspi_request_mmio_ptr(void *opaque, hwaddr addr, unsigned *size,
unsigned *offset)
{
XilinxQSPIPS *q = opaque;
hwaddr offset_within_the_region = addr & ~(LQSPI_CACHE_SIZE - 1);
lqspi_load_cache(opaque, offset_within_the_region);
*size = LQSPI_CACHE_SIZE;
*offset = offset_within_the_region;
return q->lqspi_buf;
}
static uint64_t
lqspi_read(void *opaque, hwaddr addr, unsigned int size)
{
XilinxQSPIPS *q = opaque;
uint32_t ret;
if (addr >= q->lqspi_cached_addr &&
addr <= q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
uint8_t *retp = &q->lqspi_buf[addr - q->lqspi_cached_addr];
ret = cpu_to_le32(*(uint32_t *)retp);
DB_PRINT_L(1, "addr: %08x, data: %08x\n", (unsigned)addr,
(unsigned)ret);
return ret;
} else {
lqspi_load_cache(opaque, addr);
return lqspi_read(opaque, addr, size);
}
}
static const MemoryRegionOps lqspi_ops = {
.read = lqspi_read,
.request_ptr = lqspi_request_mmio_ptr,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,