diff options
Diffstat (limited to 'arch/arm/mach-imx/system.c')
| -rw-r--r-- | arch/arm/mach-imx/system.c | 58 |
1 files changed, 25 insertions, 33 deletions
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c index 105d1ce4ed9d..c06af650e6b1 100644 --- a/arch/arm/mach-imx/system.c +++ b/arch/arm/mach-imx/system.c @@ -34,25 +34,19 @@ static void __iomem *wdog_base; static struct clk *wdog_clk; +static int wcr_enable = (1 << 2); /* * Reset the system. It is called by machine_restart(). */ void mxc_restart(enum reboot_mode mode, const char *cmd) { - unsigned int wcr_enable; - if (!wdog_base) goto reset_fallback; if (!IS_ERR(wdog_clk)) clk_enable(wdog_clk); - if (cpu_is_mx1()) - wcr_enable = (1 << 0); - else - wcr_enable = (1 << 2); - /* Assert SRS signal */ imx_writew(wcr_enable, wdog_base); /* @@ -89,6 +83,14 @@ void __init mxc_arch_reset_init(void __iomem *base) clk_prepare(wdog_clk); } +#ifdef CONFIG_SOC_IMX1 +void __init imx1_reset_init(void __iomem *base) +{ + wcr_enable = (1 << 0); + mxc_arch_reset_init(base); +} +#endif + #ifdef CONFIG_CACHE_L2X0 void __init imx_init_l2cache(void) { @@ -98,38 +100,28 @@ void __init imx_init_l2cache(void) np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache"); if (!np) - goto out; + return; l2x0_base = of_iomap(np, 0); - if (!l2x0_base) { - of_node_put(np); - goto out; - } + if (!l2x0_base) + goto put_node; - if (readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN) - goto skip_if_enabled; + if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { + /* Configure the L2 PREFETCH and POWER registers */ + val = readl_relaxed(l2x0_base + L310_PREFETCH_CTRL); + val |= L310_PREFETCH_CTRL_DBL_LINEFILL | + L310_PREFETCH_CTRL_INSTR_PREFETCH | + L310_PREFETCH_CTRL_DATA_PREFETCH; - /* Configure the L2 PREFETCH and POWER registers */ - val = readl_relaxed(l2x0_base + L310_PREFETCH_CTRL); - val |= 0x70800000; - /* - * 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 - * 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. - */ - if (cpu_is_imx6q()) - val &= ~(1 << 30 | 1 << 23); - writel_relaxed(val, l2x0_base + L310_PREFETCH_CTRL); + /* Set perfetch offset to improve performance */ + val &= ~L310_PREFETCH_CTRL_OFFSET_MASK; + val |= 15; + + writel_relaxed(val, l2x0_base + L310_PREFETCH_CTRL); + } -skip_if_enabled: iounmap(l2x0_base); +put_node: of_node_put(np); - -out: - l2x0_of_init(0, ~0); } #endif |