+/* SPDX-License-Identifier: GPL-2.0 */
/*
- * From Coreboot file of same name
+ * From coreboot file of same name
*
* Copyright (C) 2014 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0
*/
#ifndef _ARCH_ASM_LAPIC_H
#define _ARCH_ASM_LAPIC_H
-#include <asm/io.h>
-#include <asm/lapic_def.h>
-#include <asm/msr.h>
-#include <asm/processor.h>
-
-/* See if I need to initialize the local apic */
-#if CONFIG_SMP || CONFIG_IOAPIC
-# define NEED_LAPIC 1
-#else
-# define NEED_LAPIC 0
-#endif
-
-static inline __attribute__((always_inline))
- unsigned long lapic_read(unsigned long reg)
-{
- return readl(LAPIC_DEFAULT_BASE + reg);
-}
-
-static inline __attribute__((always_inline))
- void lapic_write(unsigned long reg, unsigned long val)
-{
- writel(val, LAPIC_DEFAULT_BASE + reg);
-}
-
-static inline __attribute__((always_inline)) void lapic_wait_icr_idle(void)
-{
- do { } while (lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY);
-}
-
-static inline void enable_lapic(void)
-{
- msr_t msr;
-
- msr = msr_read(LAPIC_BASE_MSR);
- msr.hi &= 0xffffff00;
- msr.lo |= LAPIC_BASE_MSR_ENABLE;
- msr.lo &= ~LAPIC_BASE_MSR_ADDR_MASK;
- msr.lo |= LAPIC_DEFAULT_BASE;
- msr_write(LAPIC_BASE_MSR, msr);
-}
-
-static inline void disable_lapic(void)
-{
- msr_t msr;
-
- msr = msr_read(LAPIC_BASE_MSR);
- msr.lo &= ~(1 << 11);
- msr_write(LAPIC_BASE_MSR, msr);
-}
-
-static inline __attribute__((always_inline)) unsigned long lapicid(void)
-{
- return lapic_read(LAPIC_ID) >> 24;
-}
-
-#if !CONFIG_AP_IN_SIPI_WAIT
-/* If we need to go back to sipi wait, we use the long non-inlined version of
- * this function in lapic_cpu_init.c
- */
-static inline __attribute__((always_inline)) void stop_this_cpu(void)
-{
- /* Called by an AP when it is ready to halt and wait for a new task */
- for (;;)
- cpu_hlt();
-}
-#else
-void stop_this_cpu(void);
-#endif
-
-#define xchg(ptr, v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v), (ptr), \
- sizeof(*(ptr))))
-
-struct __xchg_dummy { unsigned long a[100]; };
-#define __xg(x) ((struct __xchg_dummy *)(x))
-
-/*
- * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
- * Note 2: xchg has side effect, so that attribute volatile is necessary,
- * but generally the primitive is invalid, *ptr is output argument. --ANK
- */
-static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
- int size)
-{
- switch (size) {
- case 1:
- __asm__ __volatile__("xchgb %b0,%1"
- : "=q" (x)
- : "m" (*__xg(ptr)), "0" (x)
- : "memory");
- break;
- case 2:
- __asm__ __volatile__("xchgw %w0,%1"
- : "=r" (x)
- : "m" (*__xg(ptr)), "0" (x)
- : "memory");
- break;
- case 4:
- __asm__ __volatile__("xchgl %0,%1"
- : "=r" (x)
- : "m" (*__xg(ptr)), "0" (x)
- : "memory");
- break;
- }
-
- return x;
-}
-
-static inline void lapic_write_atomic(unsigned long reg, unsigned long v)
-{
- (void)xchg((volatile unsigned long *)(LAPIC_DEFAULT_BASE + reg), v);
-}
-
-
-#ifdef X86_GOOD_APIC
-# define FORCE_READ_AROUND_WRITE 0
-# define lapic_read_around(x) lapic_read(x)
-# define lapic_write_around(x, y) lapic_write((x), (y))
-#else
-# define FORCE_READ_AROUND_WRITE 1
-# define lapic_read_around(x) lapic_read(x)
-# define lapic_write_around(x, y) lapic_write_atomic((x), (y))
-#endif
-
-static inline int lapic_remote_read(int apicid, int reg, unsigned long *pvalue)
-{
- int timeout;
- unsigned long status;
- int result;
- lapic_wait_icr_idle();
- lapic_write_around(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(apicid));
- lapic_write_around(LAPIC_ICR, LAPIC_DM_REMRD | (reg >> 4));
- timeout = 0;
- do {
- status = lapic_read(LAPIC_ICR) & LAPIC_ICR_RR_MASK;
- } while (status == LAPIC_ICR_RR_INPROG && timeout++ < 1000);
-
- result = -1;
- if (status == LAPIC_ICR_RR_VALID) {
- *pvalue = lapic_read(LAPIC_RRR);
- result = 0;
- }
- return result;
-}
-
+#define LAPIC_DEFAULT_BASE 0xfee00000
+
+#define LAPIC_ID 0x020
+#define LAPIC_LVR 0x030
+
+#define LAPIC_TASKPRI 0x080
+#define LAPIC_TPRI_MASK 0xff
+
+#define LAPIC_RRR 0x0c0
+
+#define LAPIC_SPIV 0x0f0
+#define LAPIC_SPIV_ENABLE 0x100
+
+#define LAPIC_ICR 0x300
+#define LAPIC_DEST_SELF 0x40000
+#define LAPIC_DEST_ALLINC 0x80000
+#define LAPIC_DEST_ALLBUT 0xc0000
+#define LAPIC_ICR_RR_MASK 0x30000
+#define LAPIC_ICR_RR_INVALID 0x00000
+#define LAPIC_ICR_RR_INPROG 0x10000
+#define LAPIC_ICR_RR_VALID 0x20000
+#define LAPIC_INT_LEVELTRIG 0x08000
+#define LAPIC_INT_ASSERT 0x04000
+#define LAPIC_ICR_BUSY 0x01000
+#define LAPIC_DEST_LOGICAL 0x00800
+#define LAPIC_DM_FIXED 0x00000
+#define LAPIC_DM_LOWEST 0x00100
+#define LAPIC_DM_SMI 0x00200
+#define LAPIC_DM_REMRD 0x00300
+#define LAPIC_DM_NMI 0x00400
+#define LAPIC_DM_INIT 0x00500
+#define LAPIC_DM_STARTUP 0x00600
+#define LAPIC_DM_EXTINT 0x00700
+#define LAPIC_VECTOR_MASK 0x000ff
+
+#define LAPIC_ICR2 0x310
+#define GET_LAPIC_DEST_FIELD(x) (((x) >> 24) & 0xff)
+#define SET_LAPIC_DEST_FIELD(x) ((x) << 24)
+
+#define LAPIC_LVT0 0x350
+#define LAPIC_LVT1 0x360
+#define LAPIC_LVT_MASKED (1 << 16)
+#define LAPIC_LVT_LEVEL_TRIGGER (1 << 15)
+#define LAPIC_LVT_REMOTE_IRR (1 << 14)
+#define LAPIC_INPUT_POLARITY (1 << 13)
+#define LAPIC_SEND_PENDING (1 << 12)
+#define LAPIC_LVT_RESERVED_1 (1 << 11)
+#define LAPIC_DELIVERY_MODE_MASK (7 << 8)
+#define LAPIC_DELIVERY_MODE_FIXED (0 << 8)
+#define LAPIC_DELIVERY_MODE_NMI (4 << 8)
+#define LAPIC_DELIVERY_MODE_EXTINT (7 << 8)
+
+unsigned long lapic_read(unsigned long reg);
+
+void lapic_write(unsigned long reg, unsigned long v);
+
+void enable_lapic(void);
+
+void disable_lapic(void);
+
+unsigned long lapicid(void);
+
+int lapic_remote_read(int apicid, int reg, unsigned long *pvalue);
void lapic_setup(void);
-#if CONFIG_SMP
-struct device;
-int start_cpu(struct device *cpu);
-#endif /* CONFIG_SMP */
-
-int boot_cpu(void);
-
-/**
- * struct x86_cpu_priv - Information about a single CPU
- *
- * @apic_id: Advanced Programmable Interrupt Controller Identifier, which is
- * just a number representing the CPU core
- *
- * TODO: Move this to driver model once lifecycle is understood
- */
-struct x86_cpu_priv {
- int apic_id;
- int start_err;
-};
-
#endif
projects / oweals / u-boot.git / blobdiff