forked from Mirrors/opensbi
platform: Move platform features to hart
PMP & performance counters belong to a hart rather than a platform. In addition to that, these features enable reading/writing from a particular csr. Thus, they can be detected and set at runtime rather than compile time. Move PMP/MCOUNTEREN/SCOUNTEREN features to hart and detect them at runtime. Signed-off-by: Atish Patra <atish.patra@wdc.com> Tested-by: Jonathan Balkind <jbalkind@cs.princeton.edu> Reviewed-by: Anup Patel <anup.patel@wdc.com>
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@@ -12,6 +12,16 @@
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#include <sbi/sbi_types.h>
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/** Possible feature flags of a hart */
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enum sbi_hart_features {
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/** Hart has PMP support */
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SBI_HART_HAS_PMP = (1 << 0),
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/** Hart has S-mode counter enable */
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SBI_HART_HAS_SCOUNTEREN = (1 << 1),
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/** Hart has M-mode counter enable */
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SBI_HART_HAS_MCOUNTEREN = (1 << 2),
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};
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struct sbi_scratch;
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int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
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@@ -27,6 +37,7 @@ void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
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int sbi_hart_pmp_check_addr(struct sbi_scratch *scratch, unsigned long daddr,
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unsigned long attr);
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bool sbi_hart_has_feature(u32 hartid, unsigned long feature);
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unsigned long sbi_hart_get_features(u32 hartid);
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void __attribute__((noreturn)) sbi_hart_hang(void);
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@@ -52,23 +52,15 @@ enum sbi_platform_features {
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SBI_PLATFORM_HAS_TIMER_VALUE = (1 << 0),
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/** Platform has HART hotplug support */
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SBI_PLATFORM_HAS_HART_HOTPLUG = (1 << 1),
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/** Platform has PMP support */
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SBI_PLATFORM_HAS_PMP = (1 << 2),
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/** Platform has S-mode counter enable */
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SBI_PLATFORM_HAS_SCOUNTEREN = (1 << 3),
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/** Platform has M-mode counter enable */
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SBI_PLATFORM_HAS_MCOUNTEREN = (1 << 4),
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/** Platform has fault delegation support */
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SBI_PLATFORM_HAS_MFAULTS_DELEGATION = (1 << 5),
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SBI_PLATFORM_HAS_MFAULTS_DELEGATION = (1 << 2),
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/** Platform has custom secondary hart booting support */
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SBI_PLATFORM_HAS_HART_SECONDARY_BOOT = (1 << 6),
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SBI_PLATFORM_HAS_HART_SECONDARY_BOOT = (1 << 3),
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};
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/** Default feature set for a platform */
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#define SBI_PLATFORM_DEFAULT_FEATURES \
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(SBI_PLATFORM_HAS_TIMER_VALUE | SBI_PLATFORM_HAS_PMP | \
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SBI_PLATFORM_HAS_SCOUNTEREN | SBI_PLATFORM_HAS_MCOUNTEREN | \
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SBI_PLATFORM_HAS_MFAULTS_DELEGATION)
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(SBI_PLATFORM_HAS_TIMER_VALUE | SBI_PLATFORM_HAS_MFAULTS_DELEGATION)
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/** Platform functions */
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struct sbi_platform_operations {
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@@ -224,14 +216,6 @@ struct sbi_platform {
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/** Check whether the platform supports HART hotplug */
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#define sbi_platform_has_hart_hotplug(__p) \
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((__p)->features & SBI_PLATFORM_HAS_HART_HOTPLUG)
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/** Check whether the platform has PMP support */
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#define sbi_platform_has_pmp(__p) ((__p)->features & SBI_PLATFORM_HAS_PMP)
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/** Check whether the platform supports scounteren CSR */
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#define sbi_platform_has_scounteren(__p) \
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((__p)->features & SBI_PLATFORM_HAS_SCOUNTEREN)
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/** Check whether the platform supports mcounteren CSR */
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#define sbi_platform_has_mcounteren(__p) \
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((__p)->features & SBI_PLATFORM_HAS_MCOUNTEREN)
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/** Check whether the platform supports fault delegation */
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#define sbi_platform_has_mfaults_delegation(__p) \
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((__p)->features & SBI_PLATFORM_HAS_MFAULTS_DELEGATION)
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