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| author | Tom Rini <trini@ti.com> | 2014-12-01 15:24:07 -0500 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-12-01 15:24:07 -0500 |
| commit | f4e7e2d12164c3235c3f5e19a68a503623029d35 (patch) | |
| tree | dea8bdf2bf2a50f561c165b5bbd4e1195ab01994 /arch/x86/cpu/lapic.c | |
| parent | 9e374e7b729dc9f68be89cd3e3b1d4d48c768ecf (diff) | |
| parent | 908ec6e4d1d12f746cb9b7cc73430a268ceb2c92 (diff) | |
| download | u-boot-imx-f4e7e2d12164c3235c3f5e19a68a503623029d35.zip u-boot-imx-f4e7e2d12164c3235c3f5e19a68a503623029d35.tar.gz u-boot-imx-f4e7e2d12164c3235c3f5e19a68a503623029d35.tar.bz2 | |
Merge git://git.denx.de/u-boot-x86
Diffstat (limited to 'arch/x86/cpu/lapic.c')
| -rw-r--r-- | arch/x86/cpu/lapic.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/x86/cpu/lapic.c b/arch/x86/cpu/lapic.c new file mode 100644 index 0000000..4690603 --- /dev/null +++ b/arch/x86/cpu/lapic.c @@ -0,0 +1,57 @@ +/* + * From coreboot file of same name + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <asm/msr.h> +#include <asm/io.h> +#include <asm/lapic.h> +#include <asm/post.h> + +void lapic_setup(void) +{ +#if NEED_LAPIC == 1 + /* Only Pentium Pro and later have those MSR stuff */ + debug("Setting up local apic: "); + + /* Enable the local apic */ + enable_lapic(); + + /* + * Set Task Priority to 'accept all'. + */ + lapic_write_around(LAPIC_TASKPRI, + lapic_read_around(LAPIC_TASKPRI) & ~LAPIC_TPRI_MASK); + + /* Put the local apic in virtual wire mode */ + lapic_write_around(LAPIC_SPIV, (lapic_read_around(LAPIC_SPIV) & + ~(LAPIC_VECTOR_MASK)) | LAPIC_SPIV_ENABLE); + lapic_write_around(LAPIC_LVT0, (lapic_read_around(LAPIC_LVT0) & + ~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | + LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY | + LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 | + LAPIC_DELIVERY_MODE_MASK)) | + (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING | + LAPIC_DELIVERY_MODE_EXTINT)); + lapic_write_around(LAPIC_LVT1, (lapic_read_around(LAPIC_LVT1) & + ~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | + LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY | + LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 | + LAPIC_DELIVERY_MODE_MASK)) | + (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING | + LAPIC_DELIVERY_MODE_NMI)); + + debug("apic_id: 0x%02lx, ", lapicid()); +#else /* !NEED_LLAPIC */ + /* Only Pentium Pro and later have those MSR stuff */ + debug("Disabling local apic: "); + disable_lapic(); +#endif /* !NEED_LAPIC */ + debug("done.\n"); + post_code(POST_LAPIC); +} |