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authorAnup Patel <anup.patel@linaro.org>2014-04-29 09:54:15 +0400
committerChristoffer Dall <christoffer.dall@linaro.org>2014-04-30 15:18:57 +0400
commite546eea74ec66698e29c583639cf6e2a11e46490 (patch)
tree9cdcad96cfc278e735fc1892e2edd4eae6c7e667 /include/uapi/linux/psci.h
parent717abd208dff75b343243aa5ed688f62190dda5e (diff)
downloadlinux-e546eea74ec66698e29c583639cf6e2a11e46490.tar.xz
ARM/ARM64: KVM: Add common header for PSCI related defines
We need a common place to share PSCI related defines among ARM kernel, ARM64 kernel, KVM ARM/ARM64 PSCI emulation, and user space. We introduce uapi/linux/psci.h for this purpose. This newly added header will be first used by KVM ARM/ARM64 in-kernel PSCI emulation and user space (i.e. QEMU or KVMTOOL). Signed-off-by: Anup Patel <anup.patel@linaro.org> Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'include/uapi/linux/psci.h')
-rw-r--r--include/uapi/linux/psci.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h
new file mode 100644
index 000000000000..310d83e0a91b
--- /dev/null
+++ b/include/uapi/linux/psci.h
@@ -0,0 +1,90 @@
+/*
+ * ARM Power State and Coordination Interface (PSCI) header
+ *
+ * This header holds common PSCI defines and macros shared
+ * by: ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space.
+ *
+ * Copyright (C) 2014 Linaro Ltd.
+ * Author: Anup Patel <anup.patel@linaro.org>
+ */
+
+#ifndef _UAPI_LINUX_PSCI_H
+#define _UAPI_LINUX_PSCI_H
+
+/*
+ * PSCI v0.1 interface
+ *
+ * The PSCI v0.1 function numbers are implementation defined.
+ *
+ * Only PSCI return values such as: SUCCESS, NOT_SUPPORTED,
+ * INVALID_PARAMS, and DENIED defined below are applicable
+ * to PSCI v0.1.
+ */
+
+/* PSCI v0.2 interface */
+#define PSCI_0_2_FN_BASE 0x84000000
+#define PSCI_0_2_FN(n) (PSCI_0_2_FN_BASE + (n))
+#define PSCI_0_2_64BIT 0x40000000
+#define PSCI_0_2_FN64_BASE \
+ (PSCI_0_2_FN_BASE + PSCI_0_2_64BIT)
+#define PSCI_0_2_FN64(n) (PSCI_0_2_FN64_BASE + (n))
+
+#define PSCI_0_2_FN_PSCI_VERSION PSCI_0_2_FN(0)
+#define PSCI_0_2_FN_CPU_SUSPEND PSCI_0_2_FN(1)
+#define PSCI_0_2_FN_CPU_OFF PSCI_0_2_FN(2)
+#define PSCI_0_2_FN_CPU_ON PSCI_0_2_FN(3)
+#define PSCI_0_2_FN_AFFINITY_INFO PSCI_0_2_FN(4)
+#define PSCI_0_2_FN_MIGRATE PSCI_0_2_FN(5)
+#define PSCI_0_2_FN_MIGRATE_INFO_TYPE PSCI_0_2_FN(6)
+#define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU PSCI_0_2_FN(7)
+#define PSCI_0_2_FN_SYSTEM_OFF PSCI_0_2_FN(8)
+#define PSCI_0_2_FN_SYSTEM_RESET PSCI_0_2_FN(9)
+
+#define PSCI_0_2_FN64_CPU_SUSPEND PSCI_0_2_FN64(1)
+#define PSCI_0_2_FN64_CPU_ON PSCI_0_2_FN64(3)
+#define PSCI_0_2_FN64_AFFINITY_INFO PSCI_0_2_FN64(4)
+#define PSCI_0_2_FN64_MIGRATE PSCI_0_2_FN64(5)
+#define PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU PSCI_0_2_FN64(7)
+
+/* PSCI v0.2 power state encoding for CPU_SUSPEND function */
+#define PSCI_0_2_POWER_STATE_ID_MASK 0xffff
+#define PSCI_0_2_POWER_STATE_ID_SHIFT 0
+#define PSCI_0_2_POWER_STATE_TYPE_SHIFT 16
+#define PSCI_0_2_POWER_STATE_TYPE_MASK \
+ (0x1 << PSCI_0_2_POWER_STATE_TYPE_SHIFT)
+#define PSCI_0_2_POWER_STATE_AFFL_SHIFT 24
+#define PSCI_0_2_POWER_STATE_AFFL_MASK \
+ (0x3 << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
+
+/* PSCI v0.2 affinity level state returned by AFFINITY_INFO */
+#define PSCI_0_2_AFFINITY_LEVEL_ON 0
+#define PSCI_0_2_AFFINITY_LEVEL_OFF 1
+#define PSCI_0_2_AFFINITY_LEVEL_ON_PENDING 2
+
+/* PSCI v0.2 multicore support in Trusted OS returned by MIGRATE_INFO_TYPE */
+#define PSCI_0_2_TOS_UP_MIGRATE 0
+#define PSCI_0_2_TOS_UP_NO_MIGRATE 1
+#define PSCI_0_2_TOS_MP 2
+
+/* PSCI version decoding (independent of PSCI version) */
+#define PSCI_VERSION_MAJOR_SHIFT 16
+#define PSCI_VERSION_MINOR_MASK \
+ ((1U << PSCI_VERSION_MAJOR_SHIFT) - 1)
+#define PSCI_VERSION_MAJOR_MASK ~PSCI_VERSION_MINOR_MASK
+#define PSCI_VERSION_MAJOR(ver) \
+ (((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT)
+#define PSCI_VERSION_MINOR(ver) \
+ ((ver) & PSCI_VERSION_MINOR_MASK)
+
+/* PSCI return values (inclusive of all PSCI versions) */
+#define PSCI_RET_SUCCESS 0
+#define PSCI_RET_NOT_SUPPORTED -1
+#define PSCI_RET_INVALID_PARAMS -2
+#define PSCI_RET_DENIED -3
+#define PSCI_RET_ALREADY_ON -4
+#define PSCI_RET_ON_PENDING -5
+#define PSCI_RET_INTERNAL_FAILURE -6
+#define PSCI_RET_NOT_PRESENT -7
+#define PSCI_RET_DISABLED -8
+
+#endif /* _UAPI_LINUX_PSCI_H */