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target/loongarch: Add function loongarch_get_addr_from_tlb

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Function loongarch_get_addr_from_tlb() is added to get physical address
from TLB tables. TLB table only works in TCG mode, in future this
function will be moved to TCG directory.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20250423080417.3739809-3-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Bibo Mao 2025-04-23 16:04:10 +08:00 • committed by Song Gao
parent 4ac7eecb74
commit a8d1b5bca5
1 changed files with 26 additions and 6 deletions
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32
target/loongarch/cpu_helper.c
View file

@ -7,6 +7,7 @@
*/
#include "qemu/osdep.h"
#include "system/tcg.h"
#include "cpu.h"
#include "internals.h"
#include "cpu-csr.h"
@ -141,6 +142,21 @@ bool loongarch_tlb_search(CPULoongArchState *env, target_ulong vaddr,
return false;
}
static int loongarch_get_addr_from_tlb(CPULoongArchState *env, hwaddr *physical,
int *prot, target_ulong address,
MMUAccessType access_type, int mmu_idx)
{
int index, match;
match = loongarch_tlb_search(env, address, &index);
if (match) {
return loongarch_map_tlb_entry(env, physical, prot,
address, access_type, index, mmu_idx);
}
return TLBRET_NOMATCH;
}
static int loongarch_page_table_walker(CPULoongArchState *env, hwaddr *physical,
int *prot, target_ulong address)
{
@ -221,13 +237,17 @@ static int loongarch_map_address(CPULoongArchState *env, hwaddr *physical,
MMUAccessType access_type, int mmu_idx,
int is_debug)
{
int index, match;
int ret;
match = loongarch_tlb_search(env, address, &index);
if (match) {
return loongarch_map_tlb_entry(env, physical, prot,
address, access_type, index, mmu_idx);
} else if (is_debug) {
if (tcg_enabled()) {
ret = loongarch_get_addr_from_tlb(env, physical, prot, address,
access_type, mmu_idx);
if (ret != TLBRET_NOMATCH) {
return ret;
}
}
if (is_debug) {
/*
* For debugger memory access, we want to do the map when there is a
* legal mapping, even if the mapping is not yet in TLB. return 0 if