Change detection of platform/cpu from runtime to compile time via config define. This completely eliminates compiling code which is not going to run on selected platform. Code which parses and prints device / revision id still reads device id from MVEBU_REG_PCIE_DEVID register, but only once.

Signed-off-by: Pali Rohár pali@kernel.org --- arch/arm/mach-mvebu/cpu.c | 67 ++++++++++---------------- arch/arm/mach-mvebu/dram.c | 18 +++---- arch/arm/mach-mvebu/include/mach/cpu.h | 9 ---- 3 files changed, 32 insertions(+), 62 deletions(-)

diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c index 173d95a760a3..1457af1d6aa3 100644 --- a/arch/arm/mach-mvebu/cpu.c +++ b/arch/arm/mach-mvebu/cpu.c @@ -54,33 +54,6 @@ void reset_cpu(void) ; }

-int mvebu_soc_family(void) -{ - u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; - - switch (devid) { - case SOC_MV78230_ID: - case SOC_MV78260_ID: - case SOC_MV78460_ID: - return MVEBU_SOC_AXP; - - case SOC_88F6720_ID: - return MVEBU_SOC_A375; - - case SOC_88F6810_ID: - case SOC_88F6820_ID: - case SOC_88F6828_ID: - return MVEBU_SOC_A38X; - - case SOC_98DX3236_ID: - case SOC_98DX3336_ID: - case SOC_98DX4251_ID: - return MVEBU_SOC_MSYS; - } - - return MVEBU_SOC_UNKNOWN; -} - u32 get_boot_device(void) { u32 val; @@ -305,7 +278,10 @@ int print_cpuinfo(void) break; }

- if (mvebu_soc_family() == MVEBU_SOC_AXP) { + switch (devid) { + case SOC_MV78230_ID: + case SOC_MV78260_ID: + case SOC_MV78460_ID: switch (revid) { case 1: puts("A0"); @@ -317,9 +293,9 @@ int print_cpuinfo(void) printf("?? (%x)", revid); break; } - } + break;

- if (mvebu_soc_family() == MVEBU_SOC_A375) { + case SOC_88F6720_ID: switch (revid) { case MV_88F67XX_A0_ID: puts("A0"); @@ -328,9 +304,11 @@ int print_cpuinfo(void) printf("?? (%x)", revid); break; } - } + break;

- if (mvebu_soc_family() == MVEBU_SOC_A38X) { + case SOC_88F6810_ID: + case SOC_88F6820_ID: + case SOC_88F6828_ID: switch (revid) { case MV_88F68XX_Z1_ID: puts("Z1"); @@ -345,9 +323,11 @@ int print_cpuinfo(void) printf("?? (%x)", revid); break; } - } + break;

- if (mvebu_soc_family() == MVEBU_SOC_MSYS) { + case SOC_98DX3236_ID: + case SOC_98DX3336_ID: + case SOC_98DX4251_ID: switch (revid) { case 3: puts("A0"); @@ -359,6 +339,11 @@ int print_cpuinfo(void) printf("?? (%x)", revid); break; } + break; + + default: + printf("?? (%x)", revid); + break; }

get_sar_freq(&sar_freq); @@ -463,7 +448,7 @@ int arch_cpu_init(void) struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE;

- if (mvebu_soc_family() == MVEBU_SOC_A38X) { + if (IS_ENABLED(CONFIG_ARMADA_38X)) { /* * To fully release / unlock this area from cache, we need * to flush all caches and disable the L2 cache. @@ -492,7 +477,7 @@ int arch_cpu_init(void) */ mvebu_mbus_probe(NULL, 0);

- if (mvebu_soc_family() == MVEBU_SOC_AXP) { + if (IS_ENABLED(CONFIG_ARMADA_XP)) { /* * Now the SDRAM access windows can be reconfigured using * the information in the SDRAM scratch pad registers @@ -506,7 +491,7 @@ int arch_cpu_init(void) */ mvebu_mbus_probe(windows, ARRAY_SIZE(windows));

- if (mvebu_soc_family() == MVEBU_SOC_AXP) { + if (IS_ENABLED(CONFIG_ARMADA_XP)) { /* Enable GBE0, GBE1, LCD and NFC PUP */ clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0, GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN | @@ -530,9 +515,9 @@ u32 mvebu_get_nand_clock(void) { u32 reg;

- if (mvebu_soc_family() == MVEBU_SOC_A38X) + if (IS_ENABLED(CONFIG_ARMADA_38X)) reg = MVEBU_DFX_DIV_CLK_CTRL(1); - else if (mvebu_soc_family() == MVEBU_SOC_MSYS) + else if (IS_ENABLED(CONFIG_ARMADA_MSYS)) reg = MVEBU_DFX_DIV_CLK_CTRL(8); else reg = MVEBU_CORE_DIV_CLK_CTRL(1); @@ -678,7 +663,7 @@ void enable_caches(void) * ethernet driver (mvpp2). So lets keep the d-cache disabled * until this is solved. */ - if (mvebu_soc_family() != MVEBU_SOC_A375) { + if (IS_ENABLED(CONFIG_ARMADA_375)) { /* Enable D-cache. I-cache is already enabled in start.S */ dcache_enable(); } @@ -686,7 +671,7 @@ void enable_caches(void)

void v7_outer_cache_enable(void) { - if (mvebu_soc_family() == MVEBU_SOC_AXP) { + if (IS_ENABLED(CONFIG_ARMADA_XP)) { struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE; u32 u; diff --git a/arch/arm/mach-mvebu/dram.c b/arch/arm/mach-mvebu/dram.c index 349e0cc4c180..d398d0f7676a 100644 --- a/arch/arm/mach-mvebu/dram.c +++ b/arch/arm/mach-mvebu/dram.c @@ -220,7 +220,7 @@ static int ecc_enabled(void) return 0; }

-/* Return the width of the DRAM bus, or 0 for unknown. */ +/* Return the width of the DRAM bus. */ static int bus_width(void) { int full_width = 0; @@ -228,17 +228,11 @@ static int bus_width(void) if (reg_read(REG_SDRAM_CONFIG_ADDR) & (1 << REG_SDRAM_CONFIG_WIDTH_OFFS)) full_width = 1;

- switch (mvebu_soc_family()) { - case MVEBU_SOC_AXP: - return full_width ? 64 : 32; - break; - case MVEBU_SOC_A375: - case MVEBU_SOC_A38X: - case MVEBU_SOC_MSYS: - return full_width ? 32 : 16; - default: - return 0; - } +#ifdef CONFIG_ARMADA_XP + return full_width ? 64 : 32; +#else + return full_width ? 32 : 16; +#endif }

static int cycle_mode(void) diff --git a/arch/arm/mach-mvebu/include/mach/cpu.h b/arch/arm/mach-mvebu/include/mach/cpu.h index 9109f0c2582d..df0bb3c1bddd 100644 --- a/arch/arm/mach-mvebu/include/mach/cpu.h +++ b/arch/arm/mach-mvebu/include/mach/cpu.h @@ -61,14 +61,6 @@ enum cpu_attrib { CPU_ATTR_DEV_CS3 = 0x37, };

-enum { - MVEBU_SOC_AXP, - MVEBU_SOC_A375, - MVEBU_SOC_A38X, - MVEBU_SOC_MSYS, - MVEBU_SOC_UNKNOWN, -}; - #define MVEBU_SDRAM_SIZE_MAX 0xc0000000

/* @@ -151,7 +143,6 @@ unsigned int mvebu_sdram_bar(enum memory_bank bank); unsigned int mvebu_sdram_bs(enum memory_bank bank); void mvebu_sdram_size_adjust(enum memory_bank bank); int mvebu_mbus_probe(struct mbus_win windows[], int count); -int mvebu_soc_family(void); u32 mvebu_get_nand_clock(void);

void __noreturn return_to_bootrom(void);