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| author | Nitin Garg <nitin.garg@freescale.com> | 2015-03-27 14:45:43 -0500 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2015-03-27 19:48:06 -0500 |
| commit | 31751fa9cf29ef4056f49fe06a54700a89c9bdc5 (patch) | |
| tree | d6fcc8bd5211bdc6e4695f66c0fcc97c5cf1cc33 | |
| parent | e77d667b20956a37de9d367a8914ef2fe79258df (diff) | |
| download | u-boot-imx-31751fa9cf29ef4056f49fe06a54700a89c9bdc5.zip u-boot-imx-31751fa9cf29ef4056f49fe06a54700a89c9bdc5.tar.gz u-boot-imx-31751fa9cf29ef4056f49fe06a54700a89c9bdc5.tar.bz2 | |
MLK-10496: Check the PL310 version for applying errata
Apply errata based on PL310 version instead of compile
time. Also set Prefetch offset to 15, since it improves
memcpy performance by 35%. Don't enable Incr double
Linefill enable since it adversely affects memcpy
performance by about 32MB/s and reads by 90MB/s. Tested
with 4K to 16MB sized src and dst aligned buffer.
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/soc.c | 21 | ||||
| -rw-r--r-- | arch/arm/include/asm/pl310.h | 5 |
2 files changed, 15 insertions, 11 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index fc2f890..51d122e 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -1036,7 +1036,7 @@ void imx_setup_hdmi(void) void v7_outer_cache_enable(void) { struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE; - unsigned int val; + unsigned int val, cache_id; #if defined CONFIG_MX6SL struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR; @@ -1056,25 +1056,24 @@ void v7_outer_cache_enable(void) val = readl(&pl310->pl310_prefetch_ctrl); - /* Turn on the L2 I/D prefetch */ - val |= 0x30000000; + /* Turn on the L2 I/D prefetch, double linefill */ + /* Set prefetch offset with any value except 23 as per errata 765569 */ + val |= 0x7000000f; /* * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0 - * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2 + * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL/SX/DQP + * is r3p2. * But according to ARM PL310 errata: 752271 * ID: 752271: Double linefill feature can cause data corruption * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2 * Workaround: The only workaround to this erratum is to disable the * double linefill feature. This is the default behavior. */ - -#ifndef CONFIG_MX6Q - val |= 0x40800000; -#else - if (is_mx6dqp()) - val |= 0x40800000; -#endif + cache_id = readl(&pl310->pl310_cache_id); + if (((cache_id & L2X0_CACHE_ID_PART_MASK) == L2X0_CACHE_ID_PART_L310) + && ((cache_id & L2X0_CACHE_ID_RTL_MASK) < L2X0_CACHE_ID_RTL_R3P2)) + val &= ~(1 << 30); writel(val, &pl310->pl310_prefetch_ctrl); val = readl(&pl310->pl310_power_ctrl); diff --git a/arch/arm/include/asm/pl310.h b/arch/arm/include/asm/pl310.h index ddc245b..d7a7eb2 100644 --- a/arch/arm/include/asm/pl310.h +++ b/arch/arm/include/asm/pl310.h @@ -75,4 +75,9 @@ void pl310_clean_inval_all(void); void pl310_inval_range(u32 start, u32 end); void pl310_clean_inval_range(u32 start, u32 end); +#define L2X0_CACHE_ID_PART_MASK (0xf << 6) +#define L2X0_CACHE_ID_PART_L310 (3 << 6) +#define L2X0_CACHE_ID_RTL_MASK 0x3f +#define L2X0_CACHE_ID_RTL_R3P2 0x8 + #endif |