From: Pavel Pisa <p...@cmp.felk.cvut.cz>
The main reason for inclusion of minimum hypervisor related defines
is that current ARM boards firmware and loaders (U-boot for example)
start loaded operating system kernel in HYP mode to allow it take
control of virtualization (Linux/KVM for example).
---
c/src/lib/libcpu/arm/shared/include/arm-cp15.h | 30 ++++++++++++++++++++++++++
cpukit/score/cpu/arm/rtems/score/cpu.h | 1 +
2 files changed, 31 insertions(+)
diff --git a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
index 4c1966d..8357656 100644
--- a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
+++ b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h
@@ -1324,6 +1324,36 @@ arm_cp15_set_vector_base_address(void *base)
);
}
+ARM_CP15_TEXT_SECTION static inline void
+*arm_cp15_get_hyp_vector_base_address(void)
+{
+ ARM_SWITCH_REGISTERS;
+ void *base;
+
+ __asm__ volatile (
+ ARM_SWITCH_TO_ARM
+ "mrc p15, 4, %[base], c12, c0, 0\n"
+ ARM_SWITCH_BACK
+ : [base] "=&r" (base) ARM_SWITCH_ADDITIONAL_OUTPUT
+ );
+
+ return base;
+}
+
+ARM_CP15_TEXT_SECTION static inline void
+arm_cp15_set_hyp_vector_base_address(void *base)
+{
+ ARM_SWITCH_REGISTERS;
+
+ __asm__ volatile (
+ ARM_SWITCH_TO_ARM
+ "mcr p15, 4, %[base], c12, c0, 0\n"
+ ARM_SWITCH_BACK
+ : ARM_SWITCH_OUTPUT
+ : [base] "r" (base)
+ );
+}
+
/**
* @brief Sets the @a section_flags for the address range [@a begin, @a end).
*
diff --git a/cpukit/score/cpu/arm/rtems/score/cpu.h
b/cpukit/score/cpu/arm/rtems/score/cpu.h
index 815cd95..91e4ec6 100644
--- a/cpukit/score/cpu/arm/rtems/score/cpu.h
+++ b/cpukit/score/cpu/arm/rtems/score/cpu.h
@@ -82,6 +82,7 @@
#define ARM_PSR_M_IRQ 0x12
#define ARM_PSR_M_SVC 0x13
#define ARM_PSR_M_ABT 0x17
+#define ARM_PSR_M_HYP 0x1a
#define ARM_PSR_M_UND 0x1b
#define ARM_PSR_M_SYS 0x1f
--
1.9.1
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