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Message-ID: <386072610811182347i59bbb828kdc2c7d9410b2e07f@mail.gmail.com>
Date: Wed, 19 Nov 2008 15:47:07 +0800
From: "Bryan Wu" <cooloney@...nel.org>
To: torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
mingo@...e.hu
Cc: linux-kernel@...r.kernel.org, "Graf Yang" <graf.yang@...log.com>,
"Bryan Wu" <cooloney@...nel.org>, linux-arch@...r.kernel.org
Subject: Re: [PATCH 5/5] Blackfin arch: SMP supporting patchset: some other misc code
Cc, linux-arch
-Bryan
On Tue, Nov 18, 2008 at 5:05 PM, Bryan Wu <cooloney@...nel.org> wrote:
> From: Graf Yang <graf.yang@...log.com>
>
> 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@...log.com>
> Signed-off-by: Bryan Wu <cooloney@...nel.org>
> ---
> arch/blackfin/Kconfig | 32 +++++++++++++++++++++-
> arch/blackfin/kernel/vmlinux.lds.S | 4 +-
> arch/blackfin/mach-bf518/include/mach/mem_map.h | 15 ++++++++++
> arch/blackfin/mach-bf527/include/mach/mem_map.h | 15 ++++++++++
> arch/blackfin/mach-bf533/include/mach/mem_map.h | 15 ++++++++++
> arch/blackfin/mach-bf537/include/mach/mem_map.h | 15 ++++++++++
> arch/blackfin/mach-bf538/include/mach/mem_map.h | 15 ++++++++++
> arch/blackfin/mach-bf548/include/mach/mem_map.h | 15 ++++++++++
> 8 files changed, 122 insertions(+), 4 deletions(-)
>
> diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
> index 004c06c..7fc8a51 100644
> --- a/arch/blackfin/Kconfig
> +++ b/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
> @@ -804,7 +831,8 @@ 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"
> help
> diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
> index 7d12c66..2a48535 100644
> --- a/arch/blackfin/kernel/vmlinux.lds.S
> +++ b/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.
> */
> diff --git a/arch/blackfin/mach-bf518/include/mach/mem_map.h b/arch/blackfin/mach-bf518/include/mach/mem_map.h
> index 10f678f..ac95d33 100644
> --- a/arch/blackfin/mach-bf518/include/mach/mem_map.h
> +++ b/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_ */
> diff --git a/arch/blackfin/mach-bf527/include/mach/mem_map.h b/arch/blackfin/mach-bf527/include/mach/mem_map.h
> index ef46dc9..bd7fe0f 100644
> --- a/arch/blackfin/mach-bf527/include/mach/mem_map.h
> +++ b/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_ */
> diff --git a/arch/blackfin/mach-bf533/include/mach/mem_map.h b/arch/blackfin/mach-bf533/include/mach/mem_map.h
> index 581fc6e..d5eaef2 100644
> --- a/arch/blackfin/mach-bf533/include/mach/mem_map.h
> +++ b/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_ */
> diff --git a/arch/blackfin/mach-bf537/include/mach/mem_map.h b/arch/blackfin/mach-bf537/include/mach/mem_map.h
> index 5078b66..be4de76 100644
> --- a/arch/blackfin/mach-bf537/include/mach/mem_map.h
> +++ b/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_ */
> diff --git a/arch/blackfin/mach-bf538/include/mach/mem_map.h b/arch/blackfin/mach-bf538/include/mach/mem_map.h
> index d65d430..c134057 100644
> --- a/arch/blackfin/mach-bf538/include/mach/mem_map.h
> +++ b/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_ */
> diff --git a/arch/blackfin/mach-bf548/include/mach/mem_map.h b/arch/blackfin/mach-bf548/include/mach/mem_map.h
> index a222842..361eb0e 100644
> --- a/arch/blackfin/mach-bf548/include/mach/mem_map.h
> +++ b/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_ */
> --
> 1.5.6.3
>
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