From 3eb9cf076180ed2003db77bd2c33ac4ed0211089 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Thu, 10 Apr 2008 16:39:18 +1000 Subject: [POWERPC] iSeries: Use alternate paca structure for booting The iSeries HV only needs the first two fields of the paca statically initialised, so create an alternate paca that contains only those and switch to our real paca immediately after boot. This is in order to make the 1024 cpu patches easier since they will no longer have to statically initialise the pacas for iSeries. Signed-off-by: Stephen Rothwell Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/iseries/exception.S | 12 +++++++-- arch/powerpc/platforms/iseries/lpardata.c | 39 ++++++++++++++++++++++++++++-- 2 files changed, 47 insertions(+), 4 deletions(-) (limited to 'arch/powerpc/platforms') diff --git a/arch/powerpc/platforms/iseries/exception.S b/arch/powerpc/platforms/iseries/exception.S index 5381038f088..c775cd4b3d6 100644 --- a/arch/powerpc/platforms/iseries/exception.S +++ b/arch/powerpc/platforms/iseries/exception.S @@ -38,11 +38,19 @@ .globl system_reset_iSeries system_reset_iSeries: - mfspr r13,SPRN_SPRG3 /* Get paca address */ + mfspr r13,SPRN_SPRG3 /* Get alpaca address */ + LOAD_REG_IMMEDIATE(r23, alpaca) + li r0,ALPACA_SIZE + sub r23,r13,r23 + divdu r23,r23,r0 /* r23 has cpu number */ + LOAD_REG_IMMEDIATE(r13, paca) + mulli r0,r23,PACA_SIZE + add r13,r13,r0 + mtspr SPRN_SPRG3,r13 /* Save it away for the future */ mfmsr r24 ori r24,r24,MSR_RI mtmsrd r24 /* RI on */ - lhz r24,PACAPACAINDEX(r13) /* Get processor # */ + mr r24,r23 cmpwi 0,r24,0 /* Are we processor 0? */ bne 1f b .__start_initialization_iSeries /* Start up the first processor */ diff --git a/arch/powerpc/platforms/iseries/lpardata.c b/arch/powerpc/platforms/iseries/lpardata.c index 8162049bb04..dc8470850a8 100644 --- a/arch/powerpc/platforms/iseries/lpardata.c +++ b/arch/powerpc/platforms/iseries/lpardata.c @@ -18,6 +18,7 @@ #include #include #include +#include #include "naca.h" #include "vpd_areas.h" @@ -159,6 +160,40 @@ struct SpCommArea xSpCommArea = { .xFormat = 1, }; +#define ALPACA_INIT(number) \ +{ \ + .lppaca_ptr = &lppaca[number], \ + .reg_save_ptr = &iseries_reg_save[number], \ +} + +struct alpaca alpaca[] = { + ALPACA_INIT( 0), +#if NR_CPUS > 1 + ALPACA_INIT( 1), ALPACA_INIT( 2), ALPACA_INIT( 3), +#if NR_CPUS > 4 + ALPACA_INIT( 4), ALPACA_INIT( 5), ALPACA_INIT( 6), ALPACA_INIT( 7), +#if NR_CPUS > 8 + ALPACA_INIT( 8), ALPACA_INIT( 9), ALPACA_INIT(10), ALPACA_INIT(11), + ALPACA_INIT(12), ALPACA_INIT(13), ALPACA_INIT(14), ALPACA_INIT(15), + ALPACA_INIT(16), ALPACA_INIT(17), ALPACA_INIT(18), ALPACA_INIT(19), + ALPACA_INIT(20), ALPACA_INIT(21), ALPACA_INIT(22), ALPACA_INIT(23), + ALPACA_INIT(24), ALPACA_INIT(25), ALPACA_INIT(26), ALPACA_INIT(27), + ALPACA_INIT(28), ALPACA_INIT(29), ALPACA_INIT(30), ALPACA_INIT(31), +#if NR_CPUS > 32 + ALPACA_INIT(32), ALPACA_INIT(33), ALPACA_INIT(34), ALPACA_INIT(35), + ALPACA_INIT(36), ALPACA_INIT(37), ALPACA_INIT(38), ALPACA_INIT(39), + ALPACA_INIT(40), ALPACA_INIT(41), ALPACA_INIT(42), ALPACA_INIT(43), + ALPACA_INIT(44), ALPACA_INIT(45), ALPACA_INIT(46), ALPACA_INIT(47), + ALPACA_INIT(48), ALPACA_INIT(49), ALPACA_INIT(50), ALPACA_INIT(51), + ALPACA_INIT(52), ALPACA_INIT(53), ALPACA_INIT(54), ALPACA_INIT(55), + ALPACA_INIT(56), ALPACA_INIT(57), ALPACA_INIT(58), ALPACA_INIT(59), + ALPACA_INIT(60), ALPACA_INIT(61), ALPACA_INIT(62), ALPACA_INIT(63), +#endif +#endif +#endif +#endif +}; + /* The LparMap data is now located at offset 0x6000 in head.S * It was put there so that the HvReleaseData could address it * with a 32-bit offset as required by the iSeries hypervisor @@ -185,7 +220,7 @@ struct ItVpdAreas itVpdAreas = { .xSlicVpdLens = { /* VPD lengths */ 0,0,0, /* 0 - 2 */ sizeof(xItExtVpdPanel), /* 3 Extended VPD */ - sizeof(struct paca_struct), /* 4 length of Paca */ + sizeof(struct alpaca), /* 4 length of (fake) Paca */ 0, /* 5 */ sizeof(struct ItIplParmsReal),/* 6 length of IPL parms */ 26992, /* 7 length of MS VPD */ @@ -203,7 +238,7 @@ struct ItVpdAreas itVpdAreas = { .xSlicVpdAdrs = { /* VPD addresses */ 0,0,0, /* 0 - 2 */ &xItExtVpdPanel, /* 3 Extended VPD */ - &paca[0], /* 4 first Paca */ + &alpaca[0], /* 4 first (fake) Paca */ 0, /* 5 */ &xItIplParmsReal, /* 6 IPL parms */ &xMsVpd, /* 7 MS Vpd */ -- cgit v1.2.3