From 99d95bbd48f43dafdcd0540eb0da26c5655d7f33 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Mon, 14 Jul 2008 17:04:14 +0800 Subject: Blackfin arch: Remove redundant kernel option use kernel command line mem and max_mem bootargs to limit availabe memory instead. Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 8efea004aec..861a1db74df 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -664,11 +664,8 @@ static __init void setup_bootmem_allocator(void) }) static inline int __init get_mem_size(void) { -#ifdef CONFIG_MEM_SIZE - return CONFIG_MEM_SIZE; -#else -# if defined(EBIU_SDBCTL) -# if defined(BF561_FAMILY) +#if defined(EBIU_SDBCTL) +# if defined(BF561_FAMILY) int ret = 0; u32 sdbctl = bfin_read_EBIU_SDBCTL(); ret += EBSZ_TO_MEG(sdbctl >> 0); @@ -676,10 +673,10 @@ static inline int __init get_mem_size(void) ret += EBSZ_TO_MEG(sdbctl >> 16); ret += EBSZ_TO_MEG(sdbctl >> 24); return ret; -# else +# else return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL()); -# endif -# elif defined(EBIU_DDRCTL1) +# endif +#elif defined(EBIU_DDRCTL1) u32 ddrctl = bfin_read_EBIU_DDRCTL1(); int ret = 0; switch (ddrctl & 0xc0000) { @@ -694,7 +691,6 @@ static inline int __init get_mem_size(void) case DEVWD_16: break; } return ret; -# endif #endif BUG(); } -- cgit v1.2.3 From 262c3825a9f3eb0f4f30ebb4b1ee57397bcb3ffc Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Sat, 19 Jul 2008 15:42:41 +0800 Subject: Blackfin arch: Extend sram malloc to handle L2 SRAM. Extend system call to alloc L2 SRAM in application. Automatically move following sections to L2 SRAM: 1. kernel built-in l2 attribute section 2. kernel module l2 attribute section 3. elf-fdpic application l2 attribute section Signed-off-by: Sonic Zhang Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 861a1db74df..8671d1db1f9 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -104,6 +104,7 @@ void __init bf53x_relocate_l1_mem(void) unsigned long l1_code_length; unsigned long l1_data_a_length; unsigned long l1_data_b_length; + unsigned long l2_length; l1_code_length = _etext_l1 - _stext_l1; if (l1_code_length > L1_CODE_LENGTH) @@ -129,6 +130,15 @@ void __init bf53x_relocate_l1_mem(void) /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */ dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + l1_data_a_length, l1_data_b_length); + +#ifdef L2_LENGTH + l2_length = _ebss_l2 - _stext_l2; + if (l2_length > L2_LENGTH) + panic("L2 SRAM Overflow\n"); + + /* Copy _stext_l2 to _edata_l2 to L2 SRAM */ + dma_memcpy(_stext_l2, _l2_lma_start, l2_length); +#endif } /* add_memory_region to memmap */ -- cgit v1.2.3 From b1b154e503a0e590eb9e189586783dc8750f910e Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 26 Jul 2008 18:02:05 +0800 Subject: Blackfin arch: check the EXTBANKS field of the DDRCTL1 register to see if we are using both memory banks Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 8671d1db1f9..102a9db9855 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -700,6 +700,8 @@ static inline int __init get_mem_size(void) case DEVWD_8: ret *= 2; case DEVWD_16: break; } + if ((ddrctl & 0xc000) == 0x4000) + ret *= 2; return ret; #endif BUG(); -- cgit v1.2.3 From 3a2521fa75359450f5ec7e6b76847f933b7ee680 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 26 Jul 2008 18:52:56 +0800 Subject: Blackfin arch: cache the values of vco/sclk/cclk as the overhead of doing so (~24 bytes) is worth avoiding the software mult/div routines Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 44 ++++++++++++++++++++++++++++++++++---------- 1 file changed, 34 insertions(+), 10 deletions(-) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 102a9db9855..5a455b6bb54 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -850,38 +850,55 @@ static int __init topology_init(void) subsys_initcall(topology_init); +/* Get the voltage input multiplier */ +static u_long cached_vco_pll_ctl, cached_vco; static u_long get_vco(void) { u_long msel; - u_long vco; - msel = (bfin_read_PLL_CTL() >> 9) & 0x3F; + u_long pll_ctl = bfin_read_PLL_CTL(); + if (pll_ctl == cached_vco_pll_ctl) + return cached_vco; + else + cached_vco_pll_ctl = pll_ctl; + + msel = (pll_ctl >> 9) & 0x3F; if (0 == msel) msel = 64; - vco = CONFIG_CLKIN_HZ; - vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */ - vco = msel * vco; - return vco; + cached_vco = CONFIG_CLKIN_HZ; + cached_vco >>= (1 & pll_ctl); /* DF bit */ + cached_vco *= msel; + return cached_vco; } /* Get the Core clock */ +static u_long cached_cclk_pll_div, cached_cclk; u_long get_cclk(void) { u_long csel, ssel; + if (bfin_read_PLL_STAT() & 0x1) return CONFIG_CLKIN_HZ; ssel = bfin_read_PLL_DIV(); + if (ssel == cached_cclk_pll_div) + return cached_cclk; + else + cached_cclk_pll_div = ssel; + csel = ((ssel >> 4) & 0x03); ssel &= 0xf; if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */ - return get_vco() / ssel; - return get_vco() >> csel; + cached_cclk = get_vco() / ssel; + else + cached_cclk = get_vco() >> csel; + return cached_cclk; } EXPORT_SYMBOL(get_cclk); /* Get the System clock */ +static u_long cached_sclk_pll_div, cached_sclk; u_long get_sclk(void) { u_long ssel; @@ -889,13 +906,20 @@ u_long get_sclk(void) if (bfin_read_PLL_STAT() & 0x1) return CONFIG_CLKIN_HZ; - ssel = (bfin_read_PLL_DIV() & 0xf); + ssel = bfin_read_PLL_DIV(); + if (ssel == cached_sclk_pll_div) + return cached_sclk; + else + cached_sclk_pll_div = ssel; + + ssel &= 0xf; if (0 == ssel) { printk(KERN_WARNING "Invalid System Clock\n"); ssel = 1; } - return get_vco() / ssel; + cached_sclk = get_vco() / ssel; + return cached_sclk; } EXPORT_SYMBOL(get_sclk); -- cgit v1.2.3 From 9de3a0b6979a4839d67ca840e386ea06acaabe39 Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Sat, 26 Jul 2008 19:39:19 +0800 Subject: Blackfin arch: When icache is off, make sure people know it Signed-off-by: Robin Getz Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 5a455b6bb54..c2248fe8058 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -948,7 +948,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) uint32_t revid; u_long cclk = 0, sclk = 0; - u_int dcache_size = 0, dsup_banks = 0; + u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0; cpu = CPU; mmu = "none"; @@ -1017,12 +1017,15 @@ static int show_cpuinfo(struct seq_file *m, void *v) } /* Is it turned on? */ - if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))) + if (bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE) != (ENDCPLB | DMC_ENABLE)) dcache_size = 0; + if (bfin_read_IMEM_CONTROL() & (IMC | ENICPLB) == (IMC | ENICPLB)) + icache_size = 0; + seq_printf(m, "cache size\t: %d KB(L1 icache) " "%d KB(L1 dcache-%s) %d KB(L2 cache)\n", - BFIN_ICACHESIZE / 1024, dcache_size, + icache_size, dcache_size, #if defined CONFIG_BFIN_WB "wb" #elif defined CONFIG_BFIN_WT @@ -1032,8 +1035,12 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "%s\n", cache); - seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n", - BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES); + if (icache_size) + seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n", + BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES); + else + seq_printf(m, "icache setup\t: off\n"); + seq_printf(m, "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n", dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS, -- cgit v1.2.3 From 2d2009806dd843f3adc0cbbb5d2204980f28111a Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Sat, 26 Jul 2008 19:41:40 +0800 Subject: Blackfin arch: If we double fault, rather than hang forever, reset Signed-off-by: Robin Getz Signed-off-by: Bryan Wu --- arch/blackfin/kernel/setup.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'arch/blackfin/kernel/setup.c') diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index c2248fe8058..23e637eb78d 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -771,6 +771,9 @@ void __init setup_arch(char **cmdline_p) _bfin_swrst = bfin_read_SWRST(); + /* If we double fault, reset the system - otherwise we hang forever */ + bfin_write_SWRST(DOUBLE_FAULT); + if (_bfin_swrst & RESET_DOUBLE) printk(KERN_INFO "Recovering from Double Fault event\n"); else if (_bfin_swrst & RESET_WDOG) @@ -1017,10 +1020,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) } /* Is it turned on? */ - if (bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE) != (ENDCPLB | DMC_ENABLE)) + if ((bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE)) dcache_size = 0; - if (bfin_read_IMEM_CONTROL() & (IMC | ENICPLB) == (IMC | ENICPLB)) + if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) == (IMC | ENICPLB)) icache_size = 0; seq_printf(m, "cache size\t: %d KB(L1 icache) " -- cgit v1.2.3