From: Sebastian Macke <sebastian@macke.de>
Date: Thu, 3 Oct 2013 08:16:14 +0000 (+0800)
Subject: target-openrisc: Removes a non-conforming behavior for the first page of the memory
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~524^2~3^2~103^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ef8263ead779e1eecfaf1e0388f4c3941ea7ec3;p=sdk%2Femulator%2Fqemu.git

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 323a173a82..22d7cbec18 100644
--- 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,