diff options
Diffstat (limited to 'arch/arm/mach-uniphier/cache_uniphier.c')
-rw-r--r-- | arch/arm/mach-uniphier/cache_uniphier.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/cache_uniphier.c b/arch/arm/mach-uniphier/cache_uniphier.c new file mode 100644 index 0000000..e47f977 --- /dev/null +++ b/arch/arm/mach-uniphier/cache_uniphier.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2012-2014 Panasonic Corporation + * Author: Masahiro Yamada <yamada.m@jp.panasonic.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/armv7.h> +#include <asm/arch/ssc-regs.h> + +#ifdef CONFIG_UNIPHIER_L2CACHE_ON +static void uniphier_cache_maint_all(u32 operation) +{ + /* try until the command is successfully set */ + do { + writel(SSCOQM_S_ALL | SSCOQM_CE | operation, SSCOQM); + } while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE)); + + /* wait until the operation is completed */ + while (readl(SSCOLPQS) != SSCOLPQS_EF) + ; + + /* clear the complete notification flag */ + writel(SSCOLPQS_EF, SSCOLPQS); + + writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */ + readl(SSCOPE); /* need a read back to confirm */ +} + +void v7_outer_cache_flush_all(void) +{ + uniphier_cache_maint_all(SSCOQM_CM_WB_INV); +} + +void v7_outer_cache_inval_all(void) +{ + uniphier_cache_maint_all(SSCOQM_CM_INV); +} + +static void __uniphier_cache_maint_range(u32 start, u32 size, u32 operation) +{ + /* try until the command is successfully set */ + do { + writel(SSCOQM_S_ADDRESS | SSCOQM_CE | operation, SSCOQM); + writel(start, SSCOQAD); + writel(size, SSCOQSZ); + + } while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE)); + + /* wait until the operation is completed */ + while (readl(SSCOLPQS) != SSCOLPQS_EF) + ; + + /* clear the complete notification flag */ + writel(SSCOLPQS_EF, SSCOLPQS); +} + +static void uniphier_cache_maint_range(u32 start, u32 end, u32 operation) +{ + u32 size; + + /* + * If start address is not aligned to cache-line, + * do cache operation for the first cache-line + */ + start = start & ~(SSC_LINE_SIZE - 1); + + if (start == 0 && end >= (u32)(-SSC_LINE_SIZE)) { + /* this means cache operation for all range */ + uniphier_cache_maint_all(operation); + return; + } + + /* + * If end address is not aligned to cache-line, + * do cache operation for the last cache-line + */ + size = (end - start + SSC_LINE_SIZE - 1) & ~(SSC_LINE_SIZE - 1); + + while (size) { + u32 chunk_size = size > SSC_RANGE_OP_MAX_SIZE ? + SSC_RANGE_OP_MAX_SIZE : size; + __uniphier_cache_maint_range(start, chunk_size, operation); + + start += chunk_size; + size -= chunk_size; + } + + writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */ + readl(SSCOPE); /* need a read back to confirm */ +} + +void v7_outer_cache_flush_range(u32 start, u32 end) +{ + uniphier_cache_maint_range(start, end, SSCOQM_CM_WB_INV); +} + +void v7_outer_cache_inval_range(u32 start, u32 end) +{ + uniphier_cache_maint_range(start, end, SSCOQM_CM_INV); +} + +void v7_outer_cache_enable(void) +{ + u32 tmp; + tmp = readl(SSCC); + tmp |= SSCC_ON; + writel(tmp, SSCC); +} +#endif + +void v7_outer_cache_disable(void) +{ + u32 tmp; + tmp = readl(SSCC); + tmp &= ~SSCC_ON; + writel(tmp, SSCC); +} + +void wakeup_secondary(void); + +void enable_caches(void) +{ + uint32_t reg; + +#ifdef CONFIG_UNIPHIER_SMP + /* + * The secondary CPU must move to DDR, + * before L2 disable. + * On SPL, the Page Table is located on the L2. + */ + wakeup_secondary(); +#endif + /* + * UniPhier SoCs must use L2 cache for init stack pointer. + * We disable L2 and L1 in this order. + * If CONFIG_SYS_DCACHE_OFF is not defined, + * caches are enabled again with a new page table. + */ + + /* L2 disable */ + v7_outer_cache_disable(); + + /* L1 disable */ + reg = get_cr(); + reg &= ~(CR_C | CR_M); + set_cr(reg); + +#ifndef CONFIG_SYS_DCACHE_OFF + dcache_enable(); +#endif +} |