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lib: sbi_ecall: Remove mcause, scratch and hartid parameters

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We remove mcause, scratch and hartid parameters from various
functions for ecall handling because we can always get current
HART id and current scratch pointer using just one CSR access.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-03-19 21:55:12 +05:30
committed by Anup Patel
parent fe37d7da29
commit 7487116b41
9 changed files with 33 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/sbi/sbi_ecall.h
View File

@@ -19,16 +19,13 @@
struct sbi_trap_regs;
struct sbi_trap_info;
struct sbi_scratch;
struct sbi_ecall_extension {
struct sbi_dlist head;
unsigned long extid_start;
unsigned long extid_end;
int (* probe)(struct sbi_scratch *scratch,
unsigned long extid, unsigned long *out_val);
int (* handle)(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
int (* probe)(unsigned long extid, unsigned long *out_val);
int (* handle)(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap);
};
@@ -51,8 +48,7 @@ int sbi_ecall_register_extension(struct sbi_ecall_extension *ext);
void sbi_ecall_unregister_extension(struct sbi_ecall_extension *ext);
int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
struct sbi_scratch *scratch);
int sbi_ecall_handler(struct sbi_trap_regs *regs);
int sbi_ecall_init(void);

2
include/sbi/sbi_hsm.h
View File

@@ -19,6 +19,8 @@
#define SBI_HART_STARTED 3
#define SBI_HART_UNKNOWN 4
struct sbi_scratch;
int sbi_hsm_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
void __noreturn sbi_hsm_exit(struct sbi_scratch *scratch);

5
lib/sbi/sbi_ecall.c
View File

@@ -79,8 +79,7 @@ void sbi_ecall_unregister_extension(struct sbi_ecall_extension *ext)
sbi_list_del_init(&ext->head);
}
int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
struct sbi_scratch *scratch)
int sbi_ecall_handler(struct sbi_trap_regs *regs)
{
int ret = 0;
struct sbi_ecall_extension *ext;
@@ -100,7 +99,7 @@ int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
ext = sbi_ecall_find_extension(extension_id);
if (ext && ext->handle) {
ret = ext->handle(scratch, extension_id, func_id,
ret = ext->handle(extension_id, func_id,
args, &out_val, &trap);
if (extension_id >= SBI_EXT_0_1_SET_TIMER &&
extension_id <= SBI_EXT_0_1_SHUTDOWN)

11
lib/sbi/sbi_ecall_base.c
View File

@@ -14,9 +14,7 @@
#include <sbi/sbi_version.h>
#include <sbi/riscv_asm.h>
static int sbi_ecall_base_probe(struct sbi_scratch *scratch,
unsigned long extid,
unsigned long *out_val)
static int sbi_ecall_base_probe(unsigned long extid, unsigned long *out_val)
{
struct sbi_ecall_extension *ext;
@@ -27,14 +25,13 @@ static int sbi_ecall_base_probe(struct sbi_scratch *scratch,
}
if (ext->probe)
return ext->probe(scratch, extid, out_val);
return ext->probe(extid, out_val);
*out_val = 1;
return 0;
}
static int sbi_ecall_base_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
@@ -64,7 +61,7 @@ static int sbi_ecall_base_handler(struct sbi_scratch *scratch,
*out_val = csr_read(CSR_MIMPID);
break;
case SBI_EXT_BASE_PROBE_EXT:
ret = sbi_ecall_base_probe(scratch, args[0], out_val);
ret = sbi_ecall_base_probe(args[0], out_val);
break;
default:
ret = SBI_ENOTSUPP;

8
lib/sbi/sbi_ecall_hsm.c
View File

@@ -12,15 +12,15 @@
#include <sbi/sbi_error.h>
#include <sbi/sbi_version.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_scratch.h>
#include <sbi/riscv_asm.h>
static int sbi_ecall_hsm_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_hsm_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
int hstate;
int ret = 0, hstate;
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
switch (funcid) {
case SBI_EXT_HSM_HART_START:

5
lib/sbi/sbi_ecall_legacy.c
View File

@@ -15,6 +15,7 @@
#include <sbi/sbi_error.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
@@ -39,14 +40,14 @@ static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
return 0;
}
static int sbi_ecall_legacy_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = current_hartid();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
ulong hmask = 0;
switch (extid) {

19
lib/sbi/sbi_ecall_replace.c
View File

@@ -14,11 +14,11 @@
#include <sbi/sbi_error.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
static int sbi_ecall_time_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_time_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
@@ -26,10 +26,11 @@ static int sbi_ecall_time_handler(struct sbi_scratch *scratch,
if (funcid == SBI_EXT_TIME_SET_TIMER) {
#if __riscv_xlen == 32
sbi_timer_event_start(scratch,
sbi_timer_event_start(sbi_scratch_thishart_ptr(),
(((u64)args[1] << 32) | (u64)args[0]));
#else
sbi_timer_event_start(scratch, (u64)args[0]);
sbi_timer_event_start(sbi_scratch_thishart_ptr(),
(u64)args[0]);
#endif
} else
ret = SBI_ENOTSUPP;
@@ -43,14 +44,14 @@ struct sbi_ecall_extension ecall_time = {
.handle = sbi_ecall_time_handler,
};
static int sbi_ecall_rfence_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = current_hartid();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
if (funcid >= SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA &&
funcid <= SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID)
@@ -106,15 +107,15 @@ struct sbi_ecall_extension ecall_rfence = {
.handle = sbi_ecall_rfence_handler,
};
static int sbi_ecall_ipi_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_ipi_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
if (funcid == SBI_EXT_IPI_SEND_IPI)
ret = sbi_ipi_send_smode(scratch, args[0], args[1]);
ret = sbi_ipi_send_smode(sbi_scratch_thishart_ptr(),
args[0], args[1]);
else
ret = SBI_ENOTSUPP;

10
lib/sbi/sbi_ecall_vendor.c
View File

@@ -13,21 +13,19 @@
#include <sbi/sbi_error.h>
#include <sbi/sbi_platform.h>
static int sbi_ecall_vendor_probe(struct sbi_scratch *scratch,
unsigned long extid,
static int sbi_ecall_vendor_probe(unsigned long extid,
unsigned long *out_val)
{
*out_val = sbi_platform_vendor_ext_check(sbi_platform_ptr(scratch),
*out_val = sbi_platform_vendor_ext_check(sbi_platform_thishart_ptr(),
extid);
return 0;
}
static int sbi_ecall_vendor_handler(struct sbi_scratch *scratch,
unsigned long extid, unsigned long funcid,
static int sbi_ecall_vendor_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
return sbi_platform_vendor_ext_provider(sbi_platform_ptr(scratch),
return sbi_platform_vendor_ext_provider(sbi_platform_thishart_ptr(),
extid, funcid, args,
out_val, out_trap);
}

2
lib/sbi/sbi_trap.c
View File

@@ -256,7 +256,7 @@ void sbi_trap_handler(struct sbi_trap_regs *regs,
break;
case CAUSE_SUPERVISOR_ECALL:
case CAUSE_HYPERVISOR_ECALL:
rc = sbi_ecall_handler(hartid, mcause, regs, scratch);
rc = sbi_ecall_handler(regs);
msg = "ecall handler failed";
break;
default: