From: Kim Phillips Date: Thu, 15 Jul 2010 00:47:29 +0000 (-0500) Subject: powerpc/8xxx: query feature reporting register for num cores on unknown cpus X-Git-Tag: v2010.09-rc1~62^2 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=a37c36f4e70bada297f281b0e542539ad43e50f6;p=oweals%2Fu-boot.git powerpc/8xxx: query feature reporting register for num cores on unknown cpus doing so helps avant garde users, such as those using simulators that allow users to configure the number of cores, so as to not have to manually adjust u-boot sources. h/w should also be reliably setting FRR NCPU in the future. Signed-off-by: Kim Phillips Signed-off-by: Kumar Gala --- diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c index dc3da1689f..97a94f4cd0 100644 --- a/arch/powerpc/cpu/mpc8xxx/cpu.c +++ b/arch/powerpc/cpu/mpc8xxx/cpu.c @@ -110,8 +110,14 @@ struct cpu_type *identify_cpu(u32 ver) } int cpu_numcores() { - struct cpu_type *cpu; - cpu = gd->cpu; + ccsr_pic_t __iomem *pic = (void *)CONFIG_SYS_MPC85xx_PIC_ADDR; + struct cpu_type *cpu = gd->cpu; + + /* better to query feature reporting register than just assume 1 */ + if (cpu == &cpu_type_unknown) + return ((in_be32(&pic->frr) & MPC85xx_PICFRR_NCPU_MASK) >> + MPC85xx_PICFRR_NCPU_SHIFT) + 1; + return cpu->num_cores; } diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h index f109e8c5c2..c1382c8c5e 100644 --- a/arch/powerpc/include/asm/immap_85xx.h +++ b/arch/powerpc/include/asm/immap_85xx.h @@ -760,6 +760,8 @@ typedef struct ccsr_pic { u32 eoi; /* End Of IRQ */ u8 res9[3916]; u32 frr; /* Feature Reporting */ +#define MPC85xx_PICFRR_NCPU_MASK 0x00001f00 +#define MPC85xx_PICFRR_NCPU_SHIFT 8 u8 res10[28]; u32 gcr; /* Global Configuration */ #define MPC85xx_PICGCR_RST 0x80000000