target-openrisc: Removes a non-conforming behavior for the first page of the memory

Where *software* leaves 0x0000 - 0x2000 unmapped, the hardware should
still allow for this area to be mapped.

Signed-off-by: Sebastian Macke <sebastian@macke.de>
Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Reviewed-by: Jia Liu <proljc@gmail.com>

diff --git a/target-openrisc/mmu.c b/target-openrisc/mmu.c
index 323a173a822fa642ddb40ebc3966ddbb52f9ab8e..22d7cbec1881356b29abc94dc435e227eecc4fdd 100644 (file)
--- a/target-openrisc/mmu.c
+++ b/target-openrisc/mmu.c
@@ -122,13 +122,6 @@ static int cpu_openrisc_get_phys_addr(OpenRISCCPU *cpu,
 {
     int ret = TLBRET_MATCH;
 
-    /* [0x0000--0x2000]: unmapped */
-    if (address < 0x2000 && (cpu->env.sr & SR_SM)) {
-        *physical = address;
-        *prot = PAGE_READ | PAGE_WRITE;
-        return ret;
-    }
-
     if (rw == 2) {    /* ITLB */
        *physical = 0;
         ret = cpu->env.tlb->cpu_openrisc_map_address_code(cpu, physical,