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-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-boot-vector.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-boot-vector.c b/arch/mips/cavium-octeon/executive/cvmx-boot-vector.c
new file mode 100644
index 000000000..b7019d218
--- /dev/null
+++ b/arch/mips/cavium-octeon/executive/cvmx-boot-vector.c
@@ -0,0 +1,167 @@
+/*
+ * 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) 2004-2017 Cavium, Inc.
+ */
+
+
+/*
+ We install this program at the bootvector:
+------------------------------------
+ .set noreorder
+ .set nomacro
+ .set noat
+reset_vector:
+ dmtc0 $k0, $31, 0 # Save $k0 to DESAVE
+ dmtc0 $k1, $31, 3 # Save $k1 to KScratch2
+
+ mfc0 $k0, $12, 0 # Status
+ mfc0 $k1, $15, 1 # Ebase
+
+ ori $k0, 0x84 # Enable 64-bit addressing, set
+ # ERL (should already be set)
+ andi $k1, 0x3ff # mask out core ID
+
+ mtc0 $k0, $12, 0 # Status
+ sll $k1, 5
+
+ lui $k0, 0xbfc0
+ cache 17, 0($0) # Core-14345, clear L1 Dcache virtual
+ # tags if the core hit an NMI
+
+ ld $k0, 0x78($k0) # k0 <- (bfc00078) pointer to the reset vector
+ synci 0($0) # Invalidate ICache to get coherent
+ # view of target code.
+
+ daddu $k0, $k0, $k1
+ nop
+
+ ld $k0, 0($k0) # k0 <- core specific target address
+ dmfc0 $k1, $31, 3 # Restore $k1 from KScratch2
+
+ beqz $k0, wait_loop # Spin in wait loop
+ nop
+
+ jr $k0
+ nop
+
+ nop # NOPs needed here to fill delay slots
+ nop # on endian reversal of previous instructions
+
+wait_loop:
+ wait
+ nop
+
+ b wait_loop
+ nop
+
+ nop
+ nop
+------------------------------------
+
+0000000000000000 <reset_vector>:
+ 0: 40baf800 dmtc0 k0,c0_desave
+ 4: 40bbf803 dmtc0 k1,c0_kscratch2
+
+ 8: 401a6000 mfc0 k0,c0_status
+ c: 401b7801 mfc0 k1,c0_ebase
+
+ 10: 375a0084 ori k0,k0,0x84
+ 14: 337b03ff andi k1,k1,0x3ff
+
+ 18: 409a6000 mtc0 k0,c0_status
+ 1c: 001bd940 sll k1,k1,0x5
+
+ 20: 3c1abfc0 lui k0,0xbfc0
+ 24: bc110000 cache 0x11,0(zero)
+
+ 28: df5a0078 ld k0,120(k0)
+ 2c: 041f0000 synci 0(zero)
+
+ 30: 035bd02d daddu k0,k0,k1
+ 34: 00000000 nop
+
+ 38: df5a0000 ld k0,0(k0)
+ 3c: 403bf803 dmfc0 k1,c0_kscratch2
+
+ 40: 13400005 beqz k0,58 <wait_loop>
+ 44: 00000000 nop
+
+ 48: 03400008 jr k0
+ 4c: 00000000 nop
+
+ 50: 00000000 nop
+ 54: 00000000 nop
+
+0000000000000058 <wait_loop>:
+ 58: 42000020 wait
+ 5c: 00000000 nop
+
+ 60: 1000fffd b 58 <wait_loop>
+ 64: 00000000 nop
+
+ 68: 00000000 nop
+ 6c: 00000000 nop
+
+ */
+
+#include <asm/octeon/cvmx-boot-vector.h>
+
+static unsigned long long _cvmx_bootvector_data[16] = {
+ 0x40baf80040bbf803ull, /* patch low order 8-bits if no KScratch*/
+ 0x401a6000401b7801ull,
+ 0x375a0084337b03ffull,
+ 0x409a6000001bd940ull,
+ 0x3c1abfc0bc110000ull,
+ 0xdf5a0078041f0000ull,
+ 0x035bd02d00000000ull,
+ 0xdf5a0000403bf803ull, /* patch low order 8-bits if no KScratch*/
+ 0x1340000500000000ull,
+ 0x0340000800000000ull,
+ 0x0000000000000000ull,
+ 0x4200002000000000ull,
+ 0x1000fffd00000000ull,
+ 0x0000000000000000ull,
+ OCTEON_BOOT_MOVEABLE_MAGIC1,
+ 0 /* To be filled in with address of vector block*/
+};
+
+/* 2^10 CPUs */
+#define VECTOR_TABLE_SIZE (1024 * sizeof(struct cvmx_boot_vector_element))
+
+static void cvmx_boot_vector_init(void *mem)
+{
+ uint64_t kseg0_mem;
+ int i;
+
+ memset(mem, 0, VECTOR_TABLE_SIZE);
+ kseg0_mem = cvmx_ptr_to_phys(mem) | 0x8000000000000000ull;
+
+ for (i = 0; i < 15; i++) {
+ uint64_t v = _cvmx_bootvector_data[i];
+
+ if (OCTEON_IS_OCTEON1PLUS() && (i == 0 || i == 7))
+ v &= 0xffffffff00000000ull; /* KScratch not availble. */
+ cvmx_write_csr(CVMX_MIO_BOOT_LOC_ADR, i * 8);
+ cvmx_write_csr(CVMX_MIO_BOOT_LOC_DAT, v);
+ }
+ cvmx_write_csr(CVMX_MIO_BOOT_LOC_ADR, 15 * 8);
+ cvmx_write_csr(CVMX_MIO_BOOT_LOC_DAT, kseg0_mem);
+ cvmx_write_csr(CVMX_MIO_BOOT_LOC_CFGX(0), 0x81fc0000);
+}
+
+/**
+ * Get a pointer to the per-core table of reset vector pointers
+ *
+ */
+struct cvmx_boot_vector_element *cvmx_boot_vector_get(void)
+{
+ struct cvmx_boot_vector_element *ret;
+
+ ret = cvmx_bootmem_alloc_named_range_once(VECTOR_TABLE_SIZE, 0,
+ (1ull << 32) - 1, 8, "__boot_vector1__", cvmx_boot_vector_init);
+ return ret;
+}
+EXPORT_SYMBOL(cvmx_boot_vector_get);