diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 123 |
1 files changed, 122 insertions, 1 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 9586be73ca4f..d07fa4fc95a3 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -389,6 +389,108 @@ static const struct l2c_init_data l2x0_init_fns __initconst = { }; /* + * L2C-210 specific code. + * + * The L2C-2x0 PA, set/way and sync operations are atomic, but we must + * ensure that no background operation is running. The way operations + * are all background tasks. + * + * While a background operation is in progress, any new operation is + * ignored (unspecified whether this causes an error.) Thankfully, not + * used on SMP. + * + * Never has a different sync register other than L2X0_CACHE_SYNC, but + * we use sync_reg_offset here so we can share some of this with L2C-310. + */ +static void __l2c210_cache_sync(void __iomem *base) +{ + writel_relaxed(0, base + sync_reg_offset); +} + +static void __l2c210_op_pa_range(void __iomem *reg, unsigned long start, + unsigned long end) +{ + while (start < end) { + writel_relaxed(start, reg); + start += CACHE_LINE_SIZE; + } +} + +static void l2c210_inv_range(unsigned long start, unsigned long end) +{ + void __iomem *base = l2x0_base; + + if (start & (CACHE_LINE_SIZE - 1)) { + start &= ~(CACHE_LINE_SIZE - 1); + writel_relaxed(start, base + L2X0_CLEAN_INV_LINE_PA); + start += CACHE_LINE_SIZE; + } + + if (end & (CACHE_LINE_SIZE - 1)) { + end &= ~(CACHE_LINE_SIZE - 1); + writel_relaxed(end, base + L2X0_CLEAN_INV_LINE_PA); + } + + __l2c210_op_pa_range(base + L2X0_INV_LINE_PA, start, end); + __l2c210_cache_sync(base); +} + +static void l2c210_clean_range(unsigned long start, unsigned long end) +{ + void __iomem *base = l2x0_base; + + start &= ~(CACHE_LINE_SIZE - 1); + __l2c210_op_pa_range(base + L2X0_CLEAN_LINE_PA, start, end); + __l2c210_cache_sync(base); +} + +static void l2c210_flush_range(unsigned long start, unsigned long end) +{ + void __iomem *base = l2x0_base; + + start &= ~(CACHE_LINE_SIZE - 1); + __l2c210_op_pa_range(base + L2X0_CLEAN_INV_LINE_PA, start, end); + __l2c210_cache_sync(base); +} + +static void l2c210_flush_all(void) +{ + void __iomem *base = l2x0_base; + + BUG_ON(!irqs_disabled()); + + __l2c_op_way(base + L2X0_CLEAN_INV_WAY); + __l2c210_cache_sync(base); +} + +static void l2c210_sync(void) +{ + __l2c210_cache_sync(l2x0_base); +} + +static void l2c210_resume(void) +{ + void __iomem *base = l2x0_base; + + if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN)) + l2c_enable(base, l2x0_saved_regs.aux_ctrl, 1); +} + +static const struct l2c_init_data l2c210_data __initconst = { + .num_lock = 1, + .enable = l2c_enable, + .outer_cache = { + .inv_range = l2c210_inv_range, + .clean_range = l2c210_clean_range, + .flush_range = l2c210_flush_range, + .flush_all = l2c210_flush_all, + .disable = l2c_disable, + .sync = l2c210_sync, + .resume = l2c210_resume, + }, +}; + +/* * L2C-310 specific code. * * Errata: @@ -623,6 +725,10 @@ void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) data = &l2x0_init_fns; break; + case L2X0_CACHE_ID_PART_L210: + data = &l2c210_data; + break; + case L2X0_CACHE_ID_PART_L310: data = &l2c310_init_fns; break; @@ -672,6 +778,21 @@ static void __init l2x0_of_parse(const struct device_node *np, *aux_mask &= ~mask; } +static const struct l2c_init_data of_l2c210_data __initconst = { + .num_lock = 1, + .of_parse = l2x0_of_parse, + .enable = l2c_enable, + .outer_cache = { + .inv_range = l2c210_inv_range, + .clean_range = l2c210_clean_range, + .flush_range = l2c210_flush_range, + .flush_all = l2c210_flush_all, + .disable = l2c_disable, + .sync = l2c210_sync, + .resume = l2c210_resume, + }, +}; + static const struct l2c_init_data of_l2x0_data __initconst = { .of_parse = l2x0_of_parse, .enable = l2x0_enable, @@ -1117,7 +1238,7 @@ static const struct l2c_init_data of_tauros3_data __initconst = { #define L2C_ID(name, fns) { .compatible = name, .data = (void *)&fns } static const struct of_device_id l2x0_ids[] __initconst = { - L2C_ID("arm,l210-cache", of_l2x0_data), + L2C_ID("arm,l210-cache", of_l2c210_data), L2C_ID("arm,l220-cache", of_l2x0_data), L2C_ID("arm,pl310-cache", of_pl310_data), L2C_ID("brcm,bcm11351-a2-pl310-cache", of_bcm_l2x0_data), |