From fa0725dead0fdc7e9330e77c42ff4ed4b36a89c4 Mon Sep 17 00:00:00 2001 From: Ryan Salsamendi Date: Fri, 30 Jun 2017 17:29:37 -0700 Subject: northbridge/intel/haswell: Fix undefined behavior Fix reports found by undefined behavior sanitizer. Left shifting an int where the right operand is >= the width of the type is undefined. Add UL suffix since it's safe for unsigned types. Change-Id: If2d34e4f05494c17bf9b9dec113b8f6863214e56 Signed-off-by: Ryan Salsamendi Reviewed-on: https://review.coreboot.org/20447 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber Reviewed-by: Paul Menzel --- src/drivers/intel/gma/i915_reg.h | 4 ++-- src/northbridge/intel/haswell/gma.c | 4 ++-- src/northbridge/intel/haswell/northbridge.c | 12 +++++++++--- 3 files changed, 13 insertions(+), 7 deletions(-) (limited to 'src') diff --git a/src/drivers/intel/gma/i915_reg.h b/src/drivers/intel/gma/i915_reg.h index dee6865224..e88ecfb87e 100644 --- a/src/drivers/intel/gma/i915_reg.h +++ b/src/drivers/intel/gma/i915_reg.h @@ -2979,7 +2979,7 @@ /* Ironlake */ #define CPU_VGACNTRL 0x41000 -#define CPU_VGA_DISABLE (1<<31) +#define CPU_VGA_DISABLE (1UL<<31) #define DIGITAL_PORT_HOTPLUG_CNTRL 0x44030 #define DIGITAL_PORTA_HOTPLUG_ENABLE (1 << 4) @@ -4177,7 +4177,7 @@ #define HSW_PWR_WELL_CTL2 0x45404 /* Driver */ #define HSW_PWR_WELL_CTL3 0x45408 /* KVMR */ #define HSW_PWR_WELL_CTL4 0x4540C /* Debug */ -#define HSW_PWR_WELL_ENABLE (1<<31) +#define HSW_PWR_WELL_ENABLE (1UL<<31) #define HSW_PWR_WELL_STATE (1<<30) #define HSW_PWR_WELL_CTL5 0x45410 #define HSW_PWR_WELL_ENABLE_SINGLE_STEP (1<<31) diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c index f22ff48707..75f3b7a944 100644 --- a/src/northbridge/intel/haswell/gma.c +++ b/src/northbridge/intel/haswell/gma.c @@ -252,13 +252,13 @@ static void gma_pm_init_pre_vbios(struct device *dev) gtt_write_regs(haswell_gt_setup); /* Wait for Mailbox Ready */ - gtt_poll(0x138124, (1 << 31), (0 << 31)); + gtt_poll(0x138124, (1UL << 31), (0UL << 31)); /* Mailbox Data - RC6 VIDS */ gtt_write(0x138128, 0x00000000); /* Mailbox Command */ gtt_write(0x138124, 0x80000004); /* Wait for Mailbox Ready */ - gtt_poll(0x138124, (1 << 31), (0 << 31)); + gtt_poll(0x138124, (1UL << 31), (0UL << 31)); /* Enable PM Interrupts */ gtt_write(GEN6_PMIER, GEN6_PM_MBOX_EVENT | GEN6_PM_THERMAL_EVENT | diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c index a8c8015d97..32be916a45 100644 --- a/src/northbridge/intel/haswell/northbridge.c +++ b/src/northbridge/intel/haswell/northbridge.c @@ -36,6 +36,7 @@ static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len) { u32 pciexbar_reg; + u32 mask; *base = 0; *len = 0; @@ -47,15 +48,20 @@ static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len) switch ((pciexbar_reg >> 1) & 3) { case 0: // 256MB - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + *base = pciexbar_reg & mask; *len = 256 * 1024 * 1024; return 1; case 1: // 128M - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + mask |= (1 << 27); + *base = pciexbar_reg & mask; *len = 128 * 1024 * 1024; return 1; case 2: // 64M - *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26)); + mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); + mask |= (1 << 27) | (1 << 26); + *base = pciexbar_reg & mask; *len = 64 * 1024 * 1024; return 1; } -- cgit v1.2.3