Blackfin arch: SMP supporting patchset: some other misc 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 some other misc code
Singed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/Kconfig

@@ -200,6 +200,32 @@ config BF561
 
 endchoice
 
+config SMP
+	depends on BF561
+	bool "Symmetric multi-processing support"
+	---help---
+	  This enables support for systems with more than one CPU,
+	  like the dual core BF561. If you have a system with only one
+	  CPU, say N. If you have a system with more than one CPU, say Y.
+
+	  If you don't know what to do here, say N.
+
+config NR_CPUS
+	int
+	depends on SMP
+	default 2 if BF561
+
+config IRQ_PER_CPU
+	bool
+	depends on SMP
+	default y
+
+config TICK_SOURCE_SYSTMR0
+	bool
+	select BFIN_GPTIMERS
+	depends on SMP
+	default y
+
 config BF_REV_MIN
 	int
 	default 0 if (BF51x || BF52x || BF54x)
@@ -502,6 +528,7 @@ source kernel/Kconfig.hz
 
 config GENERIC_TIME
 	bool "Generic time"
+	depends on !SMP
 	default y
 
 config GENERIC_CLOCKEVENTS
@@ -576,6 +603,7 @@ endmenu
 
 
 menu "Blackfin Kernel Optimizations"
+	depends on !SMP
 
 comment "Memory Optimizations"
 
@@ -738,7 +766,6 @@ config BFIN_INS_LOWOVERHEAD
 
 endmenu
 
-
 choice
 	prompt "Kernel executes from"
 	help
@@ -804,9 +831,11 @@ config BFIN_ICACHE_LOCK
 choice
 	prompt "Policy"
 	depends on BFIN_DCACHE
-	default BFIN_WB
+	default BFIN_WB if !SMP
+	default BFIN_WT if SMP
 config BFIN_WB
 	bool "Write back"
+	depends on !SMP
 	help
 	  Write Back Policy:
 	    Cached data will be written back to SDRAM only when needed.

arch/blackfin/kernel/vmlinux.lds.S

@@ -109,7 +109,7 @@ SECTIONS
 #endif
 
 		DATA_DATA
-		*(.data.*)
+		*(.data)
 		CONSTRUCTORS
 
 		/* make sure the init_task is aligned to the
@@ -161,6 +161,7 @@ SECTIONS
 		*(.con_initcall.init)
 		___con_initcall_end = .;
 	}
+	PERCPU(4)
 	SECURITY_INIT
 	.init.ramfs :
 	{
@@ -236,7 +237,6 @@ SECTIONS
 		. = ALIGN(4);
 		__ebss_l2 = .;
 	}
-
 	/* Force trailing alignment of our init section so that when we
 	 * free our init memory, we don't leave behind a partial page.
 	 */

arch/blackfin/mach-bf518/include/mach/mem_map.h

@@ -99,4 +99,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif				/* _MEM_MAP_518_H_ */

arch/blackfin/mach-bf527/include/mach/mem_map.h

@@ -99,4 +99,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif				/* _MEM_MAP_527_H_ */

arch/blackfin/mach-bf533/include/mach/mem_map.h

@@ -168,4 +168,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif				/* _MEM_MAP_533_H_ */

arch/blackfin/mach-bf537/include/mach/mem_map.h

@@ -176,4 +176,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif				/* _MEM_MAP_537_H_ */

arch/blackfin/mach-bf538/include/mach/mem_map.h

@@ -104,4 +104,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif				/* _MEM_MAP_538_H_ */

arch/blackfin/mach-bf548/include/mach/mem_map.h

@@ -108,4 +108,19 @@
 #define L1_SCRATCH_START	0xFFB00000
 #define L1_SCRATCH_LENGTH	0x1000
 
+#define get_l1_scratch_start_cpu(cpu)		L1_SCRATCH_START
+#define get_l1_code_start_cpu(cpu)		L1_CODE_START
+#define get_l1_data_a_start_cpu(cpu)		L1_DATA_A_START
+#define get_l1_data_b_start_cpu(cpu)		L1_DATA_B_START
+#define get_l1_scratch_start()			L1_SCRATCH_START
+#define get_l1_code_start()			L1_CODE_START
+#define get_l1_data_a_start()			L1_DATA_A_START
+#define get_l1_data_b_start()			L1_DATA_B_START
+
+#define GET_PDA_SAFE(preg)		\
+	preg.l = _cpu_pda;		\
+	preg.h = _cpu_pda;
+
+#define GET_PDA(preg, dreg)	GET_PDA_SAFE(preg)
+
 #endif/* _MEM_MAP_548_H_ */