1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> 4 */ 5 6 #include <common.h> 7 #include <asm/io.h> 8 #include <asm/ioapic.h> 9 #include <asm/lapic.h> 10 11 u32 io_apic_read(u32 reg) 12 { 13 writel(reg, IO_APIC_INDEX); 14 return readl(IO_APIC_DATA); 15 } 16 17 void io_apic_write(u32 reg, u32 val) 18 { 19 writel(reg, IO_APIC_INDEX); 20 writel(val, IO_APIC_DATA); 21 } 22 23 void io_apic_set_id(int ioapic_id) 24 { 25 int bsp_lapicid = lapicid(); 26 27 debug("IOAPIC: Initialising IOAPIC at %08x\n", IO_APIC_ADDR); 28 debug("IOAPIC: Bootstrap Processor Local APIC = %#02x\n", bsp_lapicid); 29 30 if (ioapic_id) { 31 debug("IOAPIC: ID = 0x%02x\n", ioapic_id); 32 /* Set IOAPIC ID if it has been specified */ 33 io_apic_write(0x00, (io_apic_read(0x00) & 0xf0ffffff) | 34 (ioapic_id << 24)); 35 } 36 } 37