diff options
Diffstat (limited to 'arch/arm/mach-socfpga/misc.c')
| -rw-r--r-- | arch/arm/mach-socfpga/misc.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/mach-socfpga/misc.c b/arch/arm/mach-socfpga/misc.c index db1983dc31..49dadd4c3d 100644 --- a/arch/arm/mach-socfpga/misc.c +++ b/arch/arm/mach-socfpga/misc.c @@ -70,6 +70,60 @@ void v7_outer_cache_disable(void) /* Disable the L2 cache */ clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); } + +void socfpga_pl310_clear(void) +{ + u32 mask = 0xff, ena = 0; + + icache_enable(); + + /* Disable the L2 cache */ + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); + + writel(0x0, &pl310->pl310_tag_latency_ctrl); + writel(0x10, &pl310->pl310_data_latency_ctrl); + + /* enable BRESP, instruction and data prefetch, full line of zeroes */ + setbits_le32(&pl310->pl310_aux_ctrl, + L310_AUX_CTRL_DATA_PREFETCH_MASK | + L310_AUX_CTRL_INST_PREFETCH_MASK | + L310_SHARED_ATT_OVERRIDE_ENABLE); + + /* Enable the L2 cache */ + ena = readl(&pl310->pl310_ctrl); + ena |= L2X0_CTRL_EN; + + /* + * Invalidate the PL310 L2 cache. Keep the invalidation code + * entirely in L1 I-cache to avoid any bus traffic through + * the L2. + */ + asm volatile( + ".align 5 \n" + " b 3f \n" + "1: str %1, [%4] \n" + " dsb \n" + " isb \n" + " str %0, [%2] \n" + " dsb \n" + " isb \n" + "2: ldr %0, [%2] \n" + " cmp %0, #0 \n" + " bne 2b \n" + " str %0, [%3] \n" + " dsb \n" + " isb \n" + " b 4f \n" + "3: b 1b \n" + "4: nop \n" + : "+r"(mask), "+r"(ena) + : "r"(&pl310->pl310_inv_way), + "r"(&pl310->pl310_cache_sync), "r"(&pl310->pl310_ctrl) + : "memory", "cc"); + + /* Disable the L2 cache */ + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); +} #endif #if defined(CONFIG_SYS_CONSOLE_IS_IN_ENV) && \ |