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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
7e4ac676 OR |
2 | /* |
3 | * Copyright (C) 2014 Oleksij Rempel <linux@rempel-privat.de> | |
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4 | */ |
5 | ||
6 | #ifndef _ALPHASCALE_ASM9260_ICOLL_H | |
7 | #define _ALPHASCALE_ASM9260_ICOLL_H | |
8 | ||
9 | #define ASM9260_NUM_IRQS 64 | |
10 | /* | |
11 | * this device provide 4 offsets for each register: | |
12 | * 0x0 - plain read write mode | |
13 | * 0x4 - set mode, OR logic. | |
14 | * 0x8 - clr mode, XOR logic. | |
15 | * 0xc - togle mode. | |
16 | */ | |
17 | ||
18 | #define ASM9260_HW_ICOLL_VECTOR 0x0000 | |
19 | /* | |
20 | * bits 31:2 | |
21 | * This register presents the vector address for the interrupt currently | |
22 | * active on the CPU IRQ input. Writing to this register notifies the | |
23 | * interrupt collector that the interrupt service routine for the current | |
24 | * interrupt has been entered. | |
25 | * The exception trap should have a LDPC instruction from this address: | |
26 | * LDPC ASM9260_HW_ICOLL_VECTOR_ADDR; IRQ exception at 0xffff0018 | |
27 | */ | |
28 | ||
29 | /* | |
30 | * The Interrupt Collector Level Acknowledge Register is used by software to | |
31 | * indicate the completion of an interrupt on a specific level. | |
32 | * This register is written at the very end of an interrupt service routine. If | |
33 | * nesting is used then the CPU irq must be turned on before writing to this | |
34 | * register to avoid a race condition in the CPU interrupt hardware. | |
35 | */ | |
36 | #define ASM9260_HW_ICOLL_LEVELACK 0x0010 | |
37 | #define ASM9260_BM_LEVELn(nr) BIT(nr) | |
38 | ||
39 | #define ASM9260_HW_ICOLL_CTRL 0x0020 | |
40 | /* | |
41 | * ASM9260_BM_CTRL_SFTRST and ASM9260_BM_CTRL_CLKGATE are not available on | |
42 | * asm9260. | |
43 | */ | |
44 | #define ASM9260_BM_CTRL_SFTRST BIT(31) | |
45 | #define ASM9260_BM_CTRL_CLKGATE BIT(30) | |
46 | /* disable interrupt level nesting */ | |
47 | #define ASM9260_BM_CTRL_NO_NESTING BIT(19) | |
48 | /* | |
49 | * Set this bit to one enable the RISC32-style read side effect associated with | |
50 | * the vector address register. In this mode, interrupt in-service is signaled | |
51 | * by the read of the ASM9260_HW_ICOLL_VECTOR register to acquire the interrupt | |
52 | * vector address. Set this bit to zero for normal operation, in which the ISR | |
53 | * signals in-service explicitly by means of a write to the | |
54 | * ASM9260_HW_ICOLL_VECTOR register. | |
55 | * 0 - Must Write to Vector register to go in-service. | |
56 | * 1 - Go in-service as a read side effect | |
57 | */ | |
58 | #define ASM9260_BM_CTRL_ARM_RSE_MODE BIT(18) | |
59 | #define ASM9260_BM_CTRL_IRQ_ENABLE BIT(16) | |
60 | ||
61 | #define ASM9260_HW_ICOLL_STAT_OFFSET 0x0030 | |
62 | /* | |
63 | * bits 5:0 | |
64 | * Vector number of current interrupt. Multiply by 4 and add to vector base | |
65 | * address to obtain the value in ASM9260_HW_ICOLL_VECTOR. | |
66 | */ | |
67 | ||
68 | /* | |
69 | * RAW0 and RAW1 provides a read-only view of the raw interrupt request lines | |
70 | * coming from various parts of the chip. Its purpose is to improve diagnostic | |
71 | * observability. | |
72 | */ | |
73 | #define ASM9260_HW_ICOLL_RAW0 0x0040 | |
74 | #define ASM9260_HW_ICOLL_RAW1 0x0050 | |
75 | ||
76 | #define ASM9260_HW_ICOLL_INTERRUPT0 0x0060 | |
77 | #define ASM9260_HW_ICOLL_INTERRUPTn(n) (0x0060 + ((n) >> 2) * 0x10) | |
78 | /* | |
79 | * WARNING: Modifying the priority of an enabled interrupt may result in | |
80 | * undefined behavior. | |
81 | */ | |
82 | #define ASM9260_BM_INT_PRIORITY_MASK 0x3 | |
83 | #define ASM9260_BM_INT_ENABLE BIT(2) | |
84 | #define ASM9260_BM_INT_SOFTIRQ BIT(3) | |
85 | ||
86 | #define ASM9260_BM_ICOLL_INTERRUPTn_SHIFT(n) (((n) & 0x3) << 3) | |
87 | #define ASM9260_BM_ICOLL_INTERRUPTn_ENABLE(n) (1 << (2 + \ | |
88 | ASM9260_BM_ICOLL_INTERRUPTn_SHIFT(n))) | |
89 | ||
90 | #define ASM9260_HW_ICOLL_VBASE 0x0160 | |
91 | /* | |
92 | * bits 31:2 | |
93 | * This bitfield holds the upper 30 bits of the base address of the vector | |
94 | * table. | |
95 | */ | |
96 | ||
97 | #define ASM9260_HW_ICOLL_CLEAR0 0x01d0 | |
98 | #define ASM9260_HW_ICOLL_CLEAR1 0x01e0 | |
99 | #define ASM9260_HW_ICOLL_CLEARn(n) (((n >> 5) * 0x10) \ | |
100 | + SET_REG) | |
101 | #define ASM9260_BM_CLEAR_BIT(n) BIT(n & 0x1f) | |
102 | ||
103 | /* Scratchpad */ | |
104 | #define ASM9260_HW_ICOLL_UNDEF_VECTOR 0x01f0 | |
105 | #endif |