From: Max Filippov <jcmvb...@gmail.com>
Read and write simcalls map physical memory to access I/O buffers, but
'read' simcall need to map it for writing and 'write' simcall need to
map it for reading, i.e. the opposite of what they do now. Fix that.
Cc: qemu-sta...@nongnu.org
Signed-off-by: Max Filippov <jcmvb...@gmail.com>
(cherry picked from commit 30c2afd151cbc38c012f7b441088980807183da6)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
target/xtensa/xtensa-semi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/xtensa/xtensa-semi.c b/target/xtensa/xtensa-semi.c
index a888a9d..98ae28c 100644
--- a/target/xtensa/xtensa-semi.c
+++ b/target/xtensa/xtensa-semi.c
@@ -173,7 +173,7 @@ void HELPER(simcall)(CPUXtensaState *env)
TARGET_PAGE_SIZE - (vaddr & (TARGET_PAGE_SIZE - 1));
uint32_t io_sz = page_left < len ? page_left : len;
hwaddr sz = io_sz;
- void *buf = cpu_physical_memory_map(paddr, &sz, is_write);
+ void *buf = cpu_physical_memory_map(paddr, &sz, !is_write);
if (buf) {
vaddr += io_sz;
@@ -182,7 +182,7 @@ void HELPER(simcall)(CPUXtensaState *env)
write(fd, buf, io_sz) :
read(fd, buf, io_sz);
regs[3] = errno_h2g(errno);
- cpu_physical_memory_unmap(buf, sz, is_write, sz);
+ cpu_physical_memory_unmap(buf, sz, !is_write, sz);
if (regs[2] == -1) {
break;
}
--
2.7.4
