Diffstat (limited to 'arch/arm/include/asm/virt.h')
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/include/asm/virt.h b/arch/arm/include/asm/virt.h
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+ * Copyright (c) 2012 Linaro Limited.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Flag indicating that the kernel was not entered in the same mode on every
+ * CPU. The zImage loader stashes this value in an SPSR, so we need an
+ * architecturally defined flag bit here (the N flag, as it happens)
+#define BOOT_CPU_MODE_MISMATCH (1<<31)
+ * __boot_cpu_mode records what mode the primary CPU was booted in.
+ * A correctly-implemented bootloader must start all CPUs in the same mode:
+ * if it fails to do this, the flag BOOT_CPU_MODE_MISMATCH is set to indicate
+ * that some CPU(s) were booted in a different mode.
+ * This allows the kernel to flag an error when the secondaries have come up.
+extern int __boot_cpu_mode;
+void __hyp_set_vectors(unsigned long phys_vector_base);
+unsigned long __hyp_get_vectors(void);
+#define __boot_cpu_mode (SVC_MODE)
+/* Reports the availability of HYP mode */
+static inline bool is_hyp_mode_available(void)
+ return ((__boot_cpu_mode & MODE_MASK) == HYP_MODE &&
+ !(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH));
+/* Check if the bootloader has booted CPUs in different modes */
+static inline bool is_hyp_mode_mismatched(void)
+ return !!(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH);
+#endif /* __ASSEMBLY__ */
+#endif /* ! VIRT_H */