cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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irq.c (4586B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
      4 *
      5 * Copyright (C) 2007  Magnus Damm
      6 * Copyright (C) 2000  Kazumoto Kojima
      7 *
      8 * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
      9 *
     10 * Modified for RTS7751R2D by
     11 * Atom Create Engineering Co., Ltd. 2002.
     12 */
     13#include <linux/init.h>
     14#include <linux/irq.h>
     15#include <linux/interrupt.h>
     16#include <linux/io.h>
     17#include <mach/r2d.h>
     18
     19#define R2D_NR_IRL 13
     20
     21enum {
     22	UNUSED = 0,
     23
     24	/* board specific interrupt sources (R2D-1 and R2D-PLUS) */
     25	EXT,              /* EXT_INT0-3 */
     26	RTC_T, RTC_A,     /* Real Time Clock */
     27	AX88796,          /* Ethernet controller (R2D-1 board) */
     28	KEY,              /* Key input (R2D-PLUS board) */
     29	SDCARD,           /* SD Card */
     30	CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
     31	SM501,            /* SM501 aka Voyager */
     32	PCI_INTD_RTL8139, /* Ethernet controller */
     33	PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
     34	PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
     35	PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
     36	PCI_INTA_SLOT,    /* PCI Slot 3.3v */
     37	TP,               /* Touch Panel */
     38};
     39
     40#ifdef CONFIG_RTS7751R2D_1
     41
     42/* Vectors for R2D-1 */
     43static struct intc_vect vectors_r2d_1[] __initdata = {
     44	INTC_IRQ(EXT, IRQ_EXT),
     45	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
     46	INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
     47	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
     48	INTC_IRQ(SM501, IRQ_VOYAGER),
     49	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
     50	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
     51	INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
     52	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
     53	INTC_IRQ(TP, IRQ_TP),
     54};
     55
     56/* IRLMSK mask register layout for R2D-1 */
     57static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
     58	{ 0xa4000000, 0, 16, /* IRLMSK */
     59	  { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
     60	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
     61	    SM501, CF_IDE, CF_CD, SDCARD, AX88796,
     62	    RTC_A, RTC_T, 0, 0, 0, EXT } },
     63};
     64
     65/* IRLn to IRQ table for R2D-1 */
     66static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
     67	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
     68	IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
     69	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
     70	IRQ_TP,
     71};
     72
     73static DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1", vectors_r2d_1,
     74			 NULL, mask_registers_r2d_1, NULL, NULL);
     75
     76#endif /* CONFIG_RTS7751R2D_1 */
     77
     78#ifdef CONFIG_RTS7751R2D_PLUS
     79
     80/* Vectors for R2D-PLUS */
     81static struct intc_vect vectors_r2d_plus[] __initdata = {
     82	INTC_IRQ(EXT, IRQ_EXT),
     83	INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
     84	INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
     85	INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
     86	INTC_IRQ(SM501, IRQ_VOYAGER),
     87	INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
     88	INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
     89	INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
     90	INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
     91	INTC_IRQ(TP, IRQ_TP),
     92};
     93
     94/* IRLMSK mask register layout for R2D-PLUS */
     95static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
     96	{ 0xa4000000, 0, 16, /* IRLMSK */
     97	  { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
     98	    PCI_INTC_PCI1520, PCI_INTD_RTL8139,
     99	    SM501, CF_IDE, CF_CD, SDCARD, KEY,
    100	    RTC_A, RTC_T, 0, 0, 0, EXT } },
    101};
    102
    103/* IRLn to IRQ table for R2D-PLUS */
    104static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
    105	IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
    106	IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
    107	IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
    108	IRQ_TP,
    109};
    110
    111static DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus", vectors_r2d_plus,
    112			 NULL, mask_registers_r2d_plus, NULL, NULL);
    113
    114#endif /* CONFIG_RTS7751R2D_PLUS */
    115
    116static unsigned char irl2irq[R2D_NR_IRL];
    117
    118int rts7751r2d_irq_demux(int irq)
    119{
    120	if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
    121		return irq;
    122
    123	return irl2irq[irq];
    124}
    125
    126/*
    127 * Initialize IRQ setting
    128 */
    129void __init init_rts7751r2d_IRQ(void)
    130{
    131	struct intc_desc *d;
    132
    133	switch (__raw_readw(PA_VERREG) & 0xf0) {
    134#ifdef CONFIG_RTS7751R2D_PLUS
    135	case 0x10:
    136		printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
    137		d = &intc_desc_r2d_plus;
    138		memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
    139		break;
    140#endif
    141#ifdef CONFIG_RTS7751R2D_1
    142	case 0x00: /* according to manual */
    143	case 0x30: /* in reality */
    144		printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
    145		d = &intc_desc_r2d_1;
    146		memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
    147		break;
    148#endif
    149	default:
    150		printk(KERN_INFO "Unknown R2D interrupt controller 0x%04x\n",
    151		       __raw_readw(PA_VERREG));
    152		return;
    153	}
    154
    155	register_intc_controller(d);
    156}