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hw/intc/loongson_ipi: Implement IOCSR address space for MIPS 

Implement IOCSR address space get functions for MIPS/Loongson CPUs.

For MIPS/Loongson without IOCSR (i.e. Loongson-3A1000), get_cpu_iocsr_as
will return as null, and send_ipi_data will fail with MEMTX_DECODE_ERROR,
which matches expected behavior on hardware.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240508-loongson3-ipi-v1-3-1a7b67704664@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Jiaxun Yang 2024-05-08 14:06:48 +01:00 committed by Philippe Mathieu-Daudé
parent b4a12dfc21
commit 91d0b151de
1 changed files with 30 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
hw/intc/loongson_ipi.c
View File

@ -15,7 +15,12 @@
#include "qemu/log.h"
#include "exec/address-spaces.h"
#include "migration/vmstate.h"
#ifdef TARGET_LOONGARCH64
#include "target/loongarch/cpu.h"
#endif
#ifdef TARGET_MIPS
#include "target/mips/cpu.h"
#endif
#include "trace.h"
static MemTxResult loongson_ipi_readl(void *opaque, hwaddr addr,
@ -56,18 +61,35 @@ static MemTxResult loongson_ipi_readl(void *opaque, hwaddr addr,
return MEMTX_OK;
}
static void send_ipi_data(CPULoongArchState *env, uint64_t val, hwaddr addr,
static AddressSpace *get_cpu_iocsr_as(CPUState *cpu)
{
#ifdef TARGET_LOONGARCH64
return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
#endif
#ifdef TARGET_MIPS
if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
return &MIPS_CPU(cpu)->env.iocsr.as;
}
#endif
return NULL;
}
static MemTxResult send_ipi_data(CPUState *cpu, uint64_t val, hwaddr addr,
MemTxAttrs attrs)
{
int i, mask = 0, data = 0;
AddressSpace *iocsr_as = get_cpu_iocsr_as(cpu);
if (!iocsr_as) {
return MEMTX_DECODE_ERROR;
}
/*
* bit 27-30 is mask for byte writing,
* if the mask is 0, we need not to do anything.
*/
if ((val >> 27) & 0xf) {
data = address_space_ldl(env->address_space_iocsr, addr,
attrs, NULL);
data = address_space_ldl(iocsr_as, addr, attrs, NULL);
for (i = 0; i < 4; i++) {
/* get mask for byte writing */
if (val & (0x1 << (27 + i))) {
@ -78,8 +100,9 @@ static void send_ipi_data(CPULoongArchState *env, uint64_t val, hwaddr addr,
data &= mask;
data |= (val >> 32) & ~mask;
address_space_stl(env->address_space_iocsr, addr,
data, attrs, NULL);
address_space_stl(iocsr_as, addr, data, attrs, NULL);
return MEMTX_OK;
}
static int archid_cmp(const void *a, const void *b)
@ -130,8 +153,7 @@ static MemTxResult mail_send(uint64_t val, MemTxAttrs attrs)
/* override requester_id */
addr = SMP_IPI_MAILBOX + CORE_BUF_20 + (val & 0x1c);
attrs.requester_id = cs->cpu_index;
send_ipi_data(&LOONGARCH_CPU(cs)->env, val, addr, attrs);
return MEMTX_OK;
return send_ipi_data(cs, val, addr, attrs);
}
static MemTxResult any_send(uint64_t val, MemTxAttrs attrs)
@ -149,8 +171,7 @@ static MemTxResult any_send(uint64_t val, MemTxAttrs attrs)
/* override requester_id */
addr = val & 0xffff;
attrs.requester_id = cs->cpu_index;
send_ipi_data(&LOONGARCH_CPU(cs)->env, val, addr, attrs);
return MEMTX_OK;
return send_ipi_data(cs, val, addr, attrs);
}
static MemTxResult loongson_ipi_writel(void *opaque, hwaddr addr, uint64_t val,