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>

8 files changed, 123 insertions, 4 deletions

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 004c06ce3198..3a468436258d 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
@@ -804,9 +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.
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 7d12c6692a65..2a485352ec14 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 10f678f3c5c0..ac95d334d082 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 ef46dc991cd4..bd7fe0fda9e8 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 581fc6eea789..d5eaef21edb7 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 5078b669431f..be4de761be96 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 d65d4301615a..c134057c91ff 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 a2228428dc06..361eb0e85bc0 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_ */