diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 112 |
1 files changed, 101 insertions, 11 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 5f381af1a7a4..a544f19c448f 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -32,6 +32,7 @@ struct l2c_init_data { unsigned num_lock; void (*of_parse)(const struct device_node *, u32 *, u32 *); void (*enable)(void __iomem *, u32, unsigned); + void (*fixup)(void __iomem *, u32, struct outer_cache_fns *); void (*save)(void __iomem *); struct outer_cache_fns outer_cache; }; @@ -394,9 +395,80 @@ static const struct l2c_init_data l2x0_init_fns __initconst = { }, }; +/* + * L2C-310 specific code. + * + * Errata: + * 588369: PL310 R0P0->R1P0, fixed R2P0. + * Affects: all clean+invalidate operations + * clean and invalidate skips the invalidate step, so we need to issue + * separate operations. We also require the above debug workaround + * enclosing this code fragment on affected parts. On unaffected parts, + * we must not use this workaround without the debug register writes + * to avoid exposing a problem similar to 727915. + * + * 727915: PL310 R2P0->R3P0, fixed R3P1. + * Affects: clean+invalidate by way + * clean and invalidate by way runs in the background, and a store can + * hit the line between the clean operation and invalidate operation, + * resulting in the store being lost. + * + * 753970: PL310 R3P0, fixed R3P1. + * Affects: sync + * prevents merging writes after the sync operation, until another L2C + * operation is performed (or a number of other conditions.) + * + * 769419: PL310 R0P0->R3P1, fixed R3P2. + * Affects: store buffer + * store buffer is not automatically drained. + */ +static void __init l2c310_fixup(void __iomem *base, u32 cache_id, + struct outer_cache_fns *fns) +{ + unsigned revision = cache_id & L2X0_CACHE_ID_RTL_MASK; + const char *errata[4]; + unsigned n = 0; + + if (revision <= L310_CACHE_ID_RTL_R3P0) + fns->set_debug = pl310_set_debug; + + if (IS_ENABLED(CONFIG_PL310_ERRATA_753970) && + revision == L310_CACHE_ID_RTL_R3P0) { + sync_reg_offset = L2X0_DUMMY_REG; + errata[n++] = "753970"; + } + + if (IS_ENABLED(CONFIG_PL310_ERRATA_769419)) + errata[n++] = "769419"; + + if (n) { + unsigned i; + + pr_info("L2C-310 errat%s", n > 1 ? "a" : "um"); + for (i = 0; i < n; i++) + pr_cont(" %s", errata[i]); + pr_cont(" enabled\n"); + } +} + +static const struct l2c_init_data l2c310_init_fns __initconst = { + .num_lock = 8, + .enable = l2c_enable, + .fixup = l2c310_fixup, + .outer_cache = { + .inv_range = l2x0_inv_range, + .clean_range = l2x0_clean_range, + .flush_range = l2x0_flush_range, + .flush_all = l2x0_flush_all, + .disable = l2x0_disable, + .sync = l2x0_cache_sync, + }, +}; + static void __init __l2c_init(const struct l2c_init_data *data, u32 aux_val, u32 aux_mask, u32 cache_id) { + struct outer_cache_fns fns; u32 aux; u32 way_size = 0; int ways; @@ -423,23 +495,20 @@ static void __init __l2c_init(const struct l2c_init_data *data, else ways = 8; type = "L310"; -#ifdef CONFIG_PL310_ERRATA_753970 - /* Unmapped register. */ - sync_reg_offset = L2X0_DUMMY_REG; -#endif break; + case L2X0_CACHE_ID_PART_L210: ways = (aux >> 13) & 0xf; type = "L210"; break; case AURORA_CACHE_ID: - sync_reg_offset = AURORA_SYNC_REG; ways = (aux >> 13) & 0xf; ways = 2 << ((ways + 1) >> 2); way_size_shift = AURORA_WAY_SIZE_SHIFT; type = "Aurora"; break; + default: /* Assume unknown chips have 8 ways */ ways = 8; @@ -457,6 +526,10 @@ static void __init __l2c_init(const struct l2c_init_data *data, l2x0_size = ways * way_size * SZ_1K; + fns = data->outer_cache; + if (data->fixup) + data->fixup(l2x0_base, cache_id, &fns); + /* * Check if l2x0 controller is already enabled. If we are booting * in non-secure mode accessing the below registers will fault. @@ -470,11 +543,7 @@ static void __init __l2c_init(const struct l2c_init_data *data, /* Save the value for resuming. */ l2x0_saved_regs.aux_ctrl = aux; - outer_cache = data->outer_cache; - - if ((cache_id & L2X0_CACHE_ID_PART_MASK) == L2X0_CACHE_ID_PART_L310 && - (cache_id & L2X0_CACHE_ID_RTL_MASK) <= L310_CACHE_ID_RTL_R3P0) - outer_cache.set_debug = pl310_set_debug; + outer_cache = fns; pr_info("%s cache controller enabled\n", type); pr_info("l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x, Cache size: %d kB\n", @@ -483,13 +552,24 @@ static void __init __l2c_init(const struct l2c_init_data *data, void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) { + const struct l2c_init_data *data; u32 cache_id; l2x0_base = base; cache_id = readl_relaxed(base + L2X0_CACHE_ID); - __l2c_init(&l2x0_init_fns, aux_val, aux_mask, cache_id); + switch (cache_id & L2X0_CACHE_ID_PART_MASK) { + default: + data = &l2x0_init_fns; + break; + + case L2X0_CACHE_ID_PART_L310: + data = &l2c310_init_fns; + break; + } + + __l2c_init(data, aux_val, aux_mask, cache_id); } #ifdef CONFIG_OF @@ -659,6 +739,7 @@ static const struct l2c_init_data of_pl310_data __initconst = { .num_lock = 8, .of_parse = pl310_of_parse, .enable = l2c_enable, + .fixup = l2c310_fixup, .save = pl310_save, .outer_cache = { .inv_range = l2x0_inv_range, @@ -802,6 +883,12 @@ static void __init aurora_enable_no_outer(void __iomem *base, u32 aux, l2c_enable(base, aux, num_lock); } +static void __init aurora_fixup(void __iomem *base, u32 cache_id, + struct outer_cache_fns *fns) +{ + sync_reg_offset = AURORA_SYNC_REG; +} + static void __init aurora_of_parse(const struct device_node *np, u32 *aux_val, u32 *aux_mask) { @@ -828,6 +915,7 @@ static const struct l2c_init_data of_aurora_with_outer_data __initconst = { .num_lock = 4, .of_parse = aurora_of_parse, .enable = l2c_enable, + .fixup = aurora_fixup, .save = aurora_save, .outer_cache = { .inv_range = aurora_inv_range, @@ -844,6 +932,7 @@ static const struct l2c_init_data of_aurora_no_outer_data __initconst = { .num_lock = 4, .of_parse = aurora_of_parse, .enable = aurora_enable_no_outer, + .fixup = aurora_fixup, .save = aurora_save, .outer_cache = { .resume = aurora_resume, @@ -995,6 +1084,7 @@ static const struct l2c_init_data of_bcm_l2x0_data __initconst = { .num_lock = 8, .of_parse = pl310_of_parse, .enable = l2c_enable, + .fixup = l2c310_fixup, .save = pl310_save, .outer_cache = { .inv_range = bcm_inv_range, |