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target/mips/addr: Add translation helpers for KSEG1 

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>
This commit is contained in:
Jiaxun Yang 2020-12-15 14:45:06 +08:00 committed by Philippe Mathieu-Daudé
parent b4cbbb47b0
commit 07ae8ccd0f
2 changed files with 12 additions and 0 deletions
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10
target/mips/addr.c
View File

@ -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;

2
target/mips/cpu.h
View File

@ -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);