From 07ae8ccd0fc4ab5a9766ebc1486ed81a1b4c5f41 Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Tue, 15 Dec 2020 14:45:06 +0800
Subject: [PATCH] target/mips/addr: Add translation helpers for KSEG1
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It's useful for bootloader to do I/O operations.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Huacai Chen <chenhuacai@kernel.org>
Message-Id: <20201215064507.30148-3-jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
target/mips/addr.c | 10 ++++++++++
target/mips/cpu.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/target/mips/addr.c b/target/mips/addr.c
index 27a6036c45..86f1c129c9 100644
--- a/target/mips/addr.c
+++ b/target/mips/addr.c
@@ -40,6 +40,16 @@ uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
return addr | 0x40000000ll;
}
+uint64_t cpu_mips_kseg1_to_phys(void *opaque, uint64_t addr)
+{
+ return addr & 0x1fffffffll;
+}
+
+uint64_t cpu_mips_phys_to_kseg1(void *opaque, uint64_t addr)
+{
+ return (addr & 0x1fffffffll) | 0xffffffffa0000000ll;
+}
+
bool mips_um_ksegs_enabled(void)
{
return mips_um_ksegs;
diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 0086f95ea2..0c2d397e4a 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -1312,6 +1312,8 @@ uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr);
uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr);
uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr);
+uint64_t cpu_mips_kseg1_to_phys(void *opaque, uint64_t addr);
+uint64_t cpu_mips_phys_to_kseg1(void *opaque, uint64_t addr);
bool mips_um_ksegs_enabled(void);
void mips_um_ksegs_enable(void);