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authorSteven J. Hill <steven.hill@cavium.com>2017-08-29 10:40:31 -0500
committerRalf Baechle <ralf@linux-mips.org>2017-09-04 21:19:03 +0200
commit9438a86a07f74670ad730ee5799a8006ae668ab9 (patch)
tree89f7a191619efaf4a197efedd10af431c1d20ba4 /arch/mips/include
parentd9a46c183a52bb864efc2fe17e564c812295647c (diff)
downloadlinux-9438a86a07f74670ad730ee5799a8006ae668ab9.tar.bz2
MIPS: Octeon: Add support for accessing the boot vector.
Used by the Octeon watchdog driver to get the address of the firmware boot vector. Signed-off-by: Steven J. Hill <steven.hill@cavium.com> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-watchdog@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17206/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/octeon/cvmx-boot-vector.h53
-rw-r--r--arch/mips/include/asm/octeon/cvmx-bootmem.h28
2 files changed, 81 insertions, 0 deletions
diff --git a/arch/mips/include/asm/octeon/cvmx-boot-vector.h b/arch/mips/include/asm/octeon/cvmx-boot-vector.h
new file mode 100644
index 000000000000..8db08241d53c
--- /dev/null
+++ b/arch/mips/include/asm/octeon/cvmx-boot-vector.h
@@ -0,0 +1,53 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003-2017 Cavium, Inc.
+ */
+
+#ifndef __CVMX_BOOT_VECTOR_H__
+#define __CVMX_BOOT_VECTOR_H__
+
+#include <asm/octeon/octeon.h>
+
+/*
+ * The boot vector table is made up of an array of 1024 elements of
+ * struct cvmx_boot_vector_element. There is one entry for each
+ * possible MIPS CPUNum, indexed by the CPUNum.
+ *
+ * Once cvmx_boot_vector_get() returns a non-NULL value (indicating
+ * success), NMI to a core will cause execution to transfer to the
+ * target_ptr location for that core's entry in the vector table.
+ *
+ * The struct cvmx_boot_vector_element fields app0, app1, and app2 can
+ * be used by the application that has set the target_ptr in any
+ * application specific manner, they are not touched by the vectoring
+ * code.
+ *
+ * The boot vector code clobbers the CP0_DESAVE register, and on
+ * OCTEON II and later CPUs also clobbers CP0_KScratch2. All GP
+ * registers are preserved, except on pre-OCTEON II CPUs, where k1 is
+ * clobbered.
+ *
+ */
+
+
+/*
+ * Applications install the boot bus code in cvmx-boot-vector.c, which
+ * uses this magic:
+ */
+#define OCTEON_BOOT_MOVEABLE_MAGIC1 0xdb00110ad358eacdull
+
+struct cvmx_boot_vector_element {
+ /* kseg0 or xkphys address of target code. */
+ uint64_t target_ptr;
+ /* Three application specific arguments. */
+ uint64_t app0;
+ uint64_t app1;
+ uint64_t app2;
+};
+
+struct cvmx_boot_vector_element *cvmx_boot_vector_get(void);
+
+#endif /* __CVMX_BOOT_VECTOR_H__ */
diff --git a/arch/mips/include/asm/octeon/cvmx-bootmem.h b/arch/mips/include/asm/octeon/cvmx-bootmem.h
index 374562507d0b..72d2e403a6e4 100644
--- a/arch/mips/include/asm/octeon/cvmx-bootmem.h
+++ b/arch/mips/include/asm/octeon/cvmx-bootmem.h
@@ -255,6 +255,34 @@ extern void *cvmx_bootmem_alloc_named_range(uint64_t size, uint64_t min_addr,
uint64_t max_addr, uint64_t align,
char *name);
+/**
+ * Allocate if needed a block of memory from a specific range of the
+ * free list that was passed to the application by the bootloader, and
+ * assign it a name in the global named block table. (part of the
+ * cvmx_bootmem_descriptor_t structure) Named blocks can later be
+ * freed. If the requested name block is already allocated, return
+ * the pointer to block of memory. If request cannot be satisfied
+ * within the address range specified, NULL is returned
+ *
+ * @param size Size in bytes of block to allocate
+ * @param min_addr minimum address of range
+ * @param max_addr maximum address of range
+ * @param align Alignment of memory to be allocated. (must be a power of 2)
+ * @param name name of block - must be less than CVMX_BOOTMEM_NAME_LEN bytes
+ * @param init Initialization function
+ *
+ * The initialization function is optional, if omitted the named block
+ * is initialized to all zeros when it is created, i.e. once.
+ *
+ * @return pointer to block of memory, NULL on error
+ */
+void *cvmx_bootmem_alloc_named_range_once(uint64_t size,
+ uint64_t min_addr,
+ uint64_t max_addr,
+ uint64_t align,
+ char *name,
+ void (*init) (void *));
+
extern int cvmx_bootmem_free_named(char *name);
/**