On Fri, Feb 23, 2018 at 02:37:35PM +0100, Mylène Josserand wrote: > Add the support for A83T. > > A83T SoC has an additional register than A80 to handle CPU configurations: > R_CPUS_CFG. Information about the register comes from Allwinner's BSP > driver. > An important difference is the Power Off Gating register for clusters > which is BIT(4) in case of SUN9I-A80 and BIT(0) in case of SUN8I-A83T. > > Signed-off-by: Mylène Josserand <[email protected]> > --- > arch/arm/mach-sunxi/Kconfig | 2 +- > arch/arm/mach-sunxi/mc_smp.c | 168 > +++++++++++++++++++++++++++++++++++++++++-- > 2 files changed, 162 insertions(+), 8 deletions(-) > > diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig > index ce53ceaf4cc5..a0ad35c41c02 100644 > --- a/arch/arm/mach-sunxi/Kconfig > +++ b/arch/arm/mach-sunxi/Kconfig > @@ -51,7 +51,7 @@ config MACH_SUN9I > config ARCH_SUNXI_MC_SMP > bool > depends on SMP > - default MACH_SUN9I > + default y if MACH_SUN9I || MACH_SUN8I > select ARM_CCI400_PORT_CTRL > select ARM_CPU_SUSPEND > > diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c > index de02e5662557..3bd9066a1422 100644 > --- a/arch/arm/mach-sunxi/mc_smp.c > +++ b/arch/arm/mach-sunxi/mc_smp.c > @@ -55,22 +55,32 @@ > #define CPUCFG_CX_RST_CTRL_L2_RST BIT(8) > #define CPUCFG_CX_RST_CTRL_CX_RST(n) BIT(4 + (n)) > #define CPUCFG_CX_RST_CTRL_CORE_RST(n) BIT(n) > +#define CPUCFG_CX_RST_CTRL_CORE_RST_ALL (0xf << 0) > > #define PRCM_CPU_PO_RST_CTRL(c) (0x4 + 0x4 * (c)) > #define PRCM_CPU_PO_RST_CTRL_CORE(n) BIT(n) > #define PRCM_CPU_PO_RST_CTRL_CORE_ALL 0xf > #define PRCM_PWROFF_GATING_REG(c) (0x100 + 0x4 * (c)) > +/* The power off register for clusters are different from SUN9I and SUN8I */ > +#define PRCM_PWROFF_GATING_REG_CLUSTER_SUN8I BIT(0) > #define PRCM_PWROFF_GATING_REG_CLUSTER_SUN9I BIT(4) > #define PRCM_PWROFF_GATING_REG_CORE(n) BIT(n) > #define PRCM_PWR_SWITCH_REG(c, cpu) (0x140 + 0x10 * (c) + 0x4 * (cpu)) > #define PRCM_CPU_SOFT_ENTRY_REG 0x164 > > +/* R_CPUCFG registers, specific to SUN8I */ > +#define R_CPUCFG_CLUSTER_PO_RST_CTRL(c) (0x30 + (c) * 0x4) > +#define R_CPUCFG_CLUSTER_PO_RST_CTRL_CORE(n) BIT(n) > +#define R_CPUCFG_CPU_SOFT_ENTRY_REG 0x01a4 > + > #define CPU0_SUPPORT_HOTPLUG_MAGIC0 0xFA50392F > #define CPU0_SUPPORT_HOTPLUG_MAGIC1 0x790DCA3A > > static void __iomem *cpucfg_base; > +static void __iomem *r_cpucfg_base; > static void __iomem *prcm_base; > static void __iomem *sram_b_smp_base; > +static bool is_sun9i;
Since you always check for that condition to always be false, can't
you do the opposite, ie have it called is_a83t, and verify it to be
true?
> /* Set the hardware entry point address */
> - writel(__pa_symbol(sunxi_mc_smp_secondary_startup),
> - prcm_base + PRCM_CPU_SOFT_ENTRY_REG);
> + if (is_sun9i)
> + writel(__pa_symbol(sunxi_mc_smp_secondary_startup),
> + prcm_base + PRCM_CPU_SOFT_ENTRY_REG);
> + else
> + writel(__pa_symbol(sunxi_mc_smp_secondary_startup),
> + r_cpucfg_base + R_CPUCFG_CPU_SOFT_ENTRY_REG);
if (is_a83t)
reg = prcm_base + PRCM_CPU_SOFT_ENTRY_REG;
else
reg = r_cpucfg_base + R_CPUCFG_CPU_SOFT_ENTRY_REG;
writel(__pa_symbol(sunxi_mc_smp_secondary_startup), reg);
?
Thanks!
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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