Blackfin arch: SMP supporting patchset: Blackfin header files and machine common code

Blackfin dual core BF561 processor can support SMP like features.
https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like

In this patch, we provide SMP extend to Blackfin header files
and machine common code

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/pda.h b/arch/blackfin/include/asm/pda.h
new file mode 100644
index 000000000000..a24d130c30f0
--- /dev/null
+++ b/arch/blackfin/include/asm/pda.h
@@ -0,0 +1,70 @@
+/*
+ * File:         arch/blackfin/include/asm/pda.h
+ * Author:       Philippe Gerum <rpm@xenomai.org>
+ *
+ *               Copyright 2007 Analog Devices Inc.
+ *
+ * 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, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _ASM_BLACKFIN_PDA_H
+#define _ASM_BLACKFIN_PDA_H
+
+#include <asm/mem_map.h>
+
+#ifndef __ASSEMBLY__
+
+struct blackfin_pda {                   /* Per-processor Data Area */
+        struct blackfin_pda *next;
+
+        unsigned long syscfg;
+#ifdef CONFIG_SMP
+        unsigned long imask;            /* Current IMASK value */
+#endif
+
+        unsigned long *ipdt;            /* Start of switchable I-CPLB table */
+        unsigned long *ipdt_swapcount;  /* Number of swaps in ipdt */
+        unsigned long *dpdt;            /* Start of switchable D-CPLB table */
+        unsigned long *dpdt_swapcount;  /* Number of swaps in dpdt */
+
+        /*
+         * Single instructions can have multiple faults, which
+         * need to be handled by traps.c, in irq5. We store
+         * the exception cause to ensure we don't miss a
+         * double fault condition
+         */
+        unsigned long ex_iptr;
+        unsigned long ex_optr;
+        unsigned long ex_buf[4];
+        unsigned long ex_imask;         /* Saved imask from exception */
+        unsigned long *ex_stack;        /* Exception stack space */
+
+#ifdef ANOMALY_05000261
+        unsigned long last_cplb_fault_retx;
+#endif
+        unsigned long dcplb_fault_addr;
+        unsigned long icplb_fault_addr;
+        unsigned long retx;
+        unsigned long seqstat;
+};
+
+extern struct blackfin_pda cpu_pda[];
+
+void reserve_pda(void);
+
+#endif  /* __ASSEMBLY__ */
+
+#endif /* _ASM_BLACKFIN_PDA_H */