[PowerPC] hwpmc: add support for POWER8/9 PMCs

This change adds support for POWER8 and POWER9 PMCs (bare metal and
pseries).
All PowerISA 2.07B non-random events are supported.

Implementation was based on that of PPC970.

Reviewed by:	jhibbits
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D26110

1 files changed, 55 insertions, 5 deletions

diff --git a/sys/dev/hwpmc/hwpmc_powerpc.h b/sys/dev/hwpmc/hwpmc_powerpc.h
index b31e9f93294d..31c20592a21f 100644
--- a/sys/dev/hwpmc/hwpmc_powerpc.h
+++ b/sys/dev/hwpmc/hwpmc_powerpc.h
@@ -46,19 +46,69 @@
 #define	POWERPC_RELOAD_COUNT_TO_PERFCTR_VALUE(V)	(0x80000000-(V))
 #define	POWERPC_PERFCTR_VALUE_TO_RELOAD_COUNT(P)	(0x80000000-(P))
 
+#define	POWERPC_MAX_PMC_VALUE	0x7fffffffUL
+
+#define	POWERPC_PMC_HAS_OVERFLOWED(n) (powerpc_pmcn_read(n) & (0x1 << 31))
+
+/*
+ * PMC value is used with OVERFLOWCNT to simulate a 64-bit counter to the
+ * machine independent part of hwpmc.
+ */
+#define	PPC_OVERFLOWCNT(pm)	(pm)->pm_md.pm_powerpc.pm_powerpc_overflowcnt
+#define	PPC_OVERFLOWCNT_MAX	0x200000000UL
+
 struct powerpc_cpu {
 	struct pmc_hw   *pc_ppcpmcs;
 	enum pmc_class	 pc_class;
 };
 
+struct pmc_ppc_event {
+	enum pmc_event pe_event;
+	uint32_t pe_flags;
+#define  PMC_FLAG_PMC1	0x01
+#define  PMC_FLAG_PMC2	0x02
+#define  PMC_FLAG_PMC3	0x04
+#define  PMC_FLAG_PMC4	0x08
+#define  PMC_FLAG_PMC5	0x10
+#define  PMC_FLAG_PMC6	0x20
+#define  PMC_FLAG_PMC7	0x40
+#define  PMC_FLAG_PMC8	0x80
+	uint32_t pe_code;
+};
+
 extern struct powerpc_cpu **powerpc_pcpu;
+extern struct pmc_ppc_event *ppc_event_codes;
+extern size_t ppc_event_codes_size;
+extern int ppc_event_first;
+extern int ppc_event_last;
+extern int ppc_max_pmcs;
+
+extern void (*powerpc_set_pmc)(int cpu, int ri, int config);
+extern pmc_value_t (*powerpc_pmcn_read)(unsigned int pmc);
+extern void (*powerpc_pmcn_write)(unsigned int pmc, uint32_t val);
+extern void (*powerpc_resume_pmc)(bool ie);
+
+int pmc_e500_initialize(struct pmc_mdep *pmc_mdep);
+int pmc_mpc7xxx_initialize(struct pmc_mdep *pmc_mdep);
+int pmc_ppc970_initialize(struct pmc_mdep *pmc_mdep);
+int pmc_power8_initialize(struct pmc_mdep *pmc_mdep);
 
-extern int pmc_e500_initialize(struct pmc_mdep *pmc_mdep);
-extern int pmc_mpc7xxx_initialize(struct pmc_mdep *pmc_mdep);
-extern int pmc_ppc970_initialize(struct pmc_mdep *pmc_mdep);
+int powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc);
+int powerpc_get_config(int cpu, int ri, struct pmc **ppm);
+int powerpc_pcpu_init(struct pmc_mdep *md, int cpu);
+int powerpc_pcpu_fini(struct pmc_mdep *md, int cpu);
+int powerpc_allocate_pmc(int cpu, int ri, struct pmc *pm,
+    const struct pmc_op_pmcallocate *a);
+int powerpc_release_pmc(int cpu, int ri, struct pmc *pmc);
+int powerpc_start_pmc(int cpu, int ri);
+int powerpc_stop_pmc(int cpu, int ri);
+int powerpc_config_pmc(int cpu, int ri, struct pmc *pm);
+pmc_value_t powerpc_pmcn_read_default(unsigned int pmc);
+void powerpc_pmcn_write_default(unsigned int pmc, uint32_t val);
+int powerpc_read_pmc(int cpu, int ri, pmc_value_t *v);
+int powerpc_write_pmc(int cpu, int ri, pmc_value_t v);
+int powerpc_pmc_intr(struct trapframe *tf);
 
-extern int powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc);
-extern int powerpc_get_config(int cpu, int ri, struct pmc **ppm);
 #endif /* _KERNEL */
 
 #endif	/* _DEV_HWPMC_POWERPC_H_ */