MIPS: BMIPS: Introduce bmips.h

bmips.h contains BMIPS definitions that are useful for SMP, vector
relocation, performance counters, etc.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2973/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/arch/mips/include/asm/bmips.h b/arch/mips/include/asm/bmips.h
new file mode 100644
index 000000000000..552a65a0cf2b
--- /dev/null
+++ b/arch/mips/include/asm/bmips.h
@@ -0,0 +1,110 @@
+/*
+ * 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) 2011 by Kevin Cernekee (cernekee@gmail.com)
+ *
+ * Definitions for BMIPS processors
+ */
+#ifndef _ASM_BMIPS_H
+#define _ASM_BMIPS_H
+
+#include <linux/compiler.h>
+#include <linux/linkage.h>
+#include <asm/addrspace.h>
+#include <asm/mipsregs.h>
+#include <asm/hazards.h>
+
+/* NOTE: the CBR register returns a PA, and it can be above 0xff00_0000 */
+#define BMIPS_GET_CBR()                 ((void __iomem *)(CKSEG1 | \
+                                         (unsigned long) \
+                                         ((read_c0_brcm_cbr() >> 18) << 18)))
+
+#define BMIPS_RAC_CONFIG                0x00000000
+#define BMIPS_RAC_ADDRESS_RANGE         0x00000004
+#define BMIPS_RAC_CONFIG_1              0x00000008
+#define BMIPS_L2_CONFIG                 0x0000000c
+#define BMIPS_LMB_CONTROL               0x0000001c
+#define BMIPS_SYSTEM_BASE               0x00000020
+#define BMIPS_PERF_GLOBAL_CONTROL       0x00020000
+#define BMIPS_PERF_CONTROL_0            0x00020004
+#define BMIPS_PERF_CONTROL_1            0x00020008
+#define BMIPS_PERF_COUNTER_0            0x00020010
+#define BMIPS_PERF_COUNTER_1            0x00020014
+#define BMIPS_PERF_COUNTER_2            0x00020018
+#define BMIPS_PERF_COUNTER_3            0x0002001c
+#define BMIPS_RELO_VECTOR_CONTROL_0     0x00030000
+#define BMIPS_RELO_VECTOR_CONTROL_1     0x00038000
+
+#define BMIPS_NMI_RESET_VEC             0x80000000
+#define BMIPS_WARM_RESTART_VEC          0x80000380
+
+#define ZSCM_REG_BASE                   0x97000000
+
+#if !defined(__ASSEMBLY__)
+
+#include <linux/cpumask.h>
+#include <asm/r4kcache.h>
+
+extern struct plat_smp_ops bmips_smp_ops;
+extern char bmips_reset_nmi_vec;
+extern char bmips_reset_nmi_vec_end;
+extern char bmips_smp_movevec;
+extern char bmips_smp_int_vec;
+extern char bmips_smp_int_vec_end;
+
+extern int bmips_smp_enabled;
+extern int bmips_cpu_offset;
+extern cpumask_t bmips_booted_mask;
+
+extern void bmips_ebase_setup(void);
+extern asmlinkage void plat_wired_tlb_setup(void);
+
+static inline unsigned long bmips_read_zscm_reg(unsigned int offset)
+{
+        unsigned long ret;
+
+        __asm__ __volatile__(
+                ".set push\n"
+                ".set noreorder\n"
+                "cache %1, 0(%2)\n"
+                "sync\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "mfc0 %0, $28, 3\n"
+                "_ssnop\n"
+                ".set pop\n"
+                : "=&r" (ret)
+                : "i" (Index_Load_Tag_S), "r" (ZSCM_REG_BASE + offset)
+                : "memory");
+        return ret;
+}
+
+static inline void bmips_write_zscm_reg(unsigned int offset, unsigned long data)
+{
+        __asm__ __volatile__(
+                ".set push\n"
+                ".set noreorder\n"
+                "mtc0 %0, $28, 3\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "cache %1, 0(%2)\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                "_ssnop\n"
+                : /* no outputs */
+                : "r" (data),
+                  "i" (Index_Store_Tag_S), "r" (ZSCM_REG_BASE + offset)
+                : "memory");
+}
+
+#endif /* !defined(__ASSEMBLY__) */
+
+#endif /* _ASM_BMIPS_H */