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dev/psci: Create macros to simplify calling SMCCC

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When calling into SMCCC functions we often only need a few arguments.
As the current function needs all 8 possible arguments to be set the
unused values will be zero.

Create a macro to pass in the used values, followed by enough zeros,
then the result pointer.

Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D46986

(cherry picked from commit e4c3536138f4a314dc26331b0a1488faae09aaf4)
This commit is contained in:
Andrew Turner 2024-10-14 15:33:44 +01:00
parent c0de8718a5
commit ee7cb98d4c
1 changed files with 32 additions and 0 deletions
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32
sys/dev/psci/smccc.h
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@ -91,6 +91,38 @@ int arm_smccc_smc(register_t, register_t, register_t, register_t, register_t,
int arm_smccc_hvc(register_t, register_t, register_t, register_t, register_t,
register_t, register_t, register_t, struct arm_smccc_res *res);
#define arm_smccc_invoke_1(func, a0, res) \
func(a0, 0, 0, 0, 0, 0, 0, 0, res)
#define arm_smccc_invoke_2(func, a0, a1, res) \
func(a0, a1, 0, 0, 0, 0, 0, 0, res)
#define arm_smccc_invoke_3(func, a0, a1, a2, res) \
func(a0, a1, a2, 0, 0, 0, 0, 0, res)
#define arm_smccc_invoke_4(func, a0, a1, a2, a3, res) \
func(a0, a1, a2, a3, 0, 0, 0, 0, res)
#define arm_smccc_invoke_5(func, a0, a1, a2, a3, a4, res) \
func(a0, a1, a2, a3, a4, 0, 0, 0, res)
#define arm_smccc_invoke_6(func, a0, a1, a2, a3, a4, a5, res) \
func(a0, a1, a2, a3, a4, a5, 0, 0, res)
#define arm_smccc_invoke_7(func, a0, a1, a2, a3, a4, a5, a6, res) \
func(a0, a1, a2, a3, a4, a5, a6, 0, res)
#define arm_smccc_invoke_8(func, a0, a1, a2, a3, a4, a5, a6, a7, res) \
func(a0, a1, a2, a3, a4, a5, a6, a7, res)
#define _arm_smccc_invoke_macro(_1, _2, _3, _4, _5, _6, _7, _8, NAME, ...) \
NAME
#define _arm_smccc_invoke(func, a0, ...) \
_arm_smccc_invoke_macro(__VA_ARGS__, arm_smccc_invoke_8, \
arm_smccc_invoke_7, arm_smccc_invoke_6, arm_smccc_invoke_5, \
arm_smccc_invoke_4, arm_smccc_invoke_3, arm_smccc_invoke_2, \
arm_smccc_invoke_1)(func, a0, __VA_ARGS__)
#define arm_smccc_invoke_hvc(a0, ...) \
_arm_smccc_invoke(arm_smccc_hvc, a0, __VA_ARGS__)
#define arm_smccc_invoke_smc(a0, ...) \
_arm_smccc_invoke(arm_smccc_smc, a0, __VA_ARGS__)
#define arm_smccc_invoke(a0, ...) \
_arm_smccc_invoke(psci_callfn, a0, __VA_ARGS__)
struct arm_smccc_1_2_regs {
register_t a0;
register_t a1;