Commit 46fa5eec authored by Graf Yang's avatar Graf Yang Committed by Bryan Wu
Browse files

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: default avatarGraf Yang <graf.yang@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 8f65873e

arch/blackfin/Kconfig

+31 −2
Original line number Diff line number Diff line
@@ -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

+2 −2
Original line number Diff line number Diff line
@@ -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

+15 −0
Original line number Diff line number Diff line
@@ -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

+15 −0
Original line number Diff line number Diff line
@@ -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

+15 −0
Original line number Diff line number Diff line
@@ -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_ */