Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2
3/***************************************************************************
4 * Registers and bits for amccs5933 pci chip
5 * copyright : (C) 2002 by Frank Mori Hess
6 ***************************************************************************/
7
8// register offsets
9enum {
10 MBEF_REG = 0x34, // mailbux empty/full
11 INTCSR_REG = 0x38, // interrupt control and status
12 BMCSR_REG = 0x3c, // bus master control and status
13};
14
15// incoming mailbox 0-3 register offsets
16extern inline int INCOMING_MAILBOX_REG(unsigned int mailbox)
17{
18 return (0x10 + 4 * mailbox);
19};
20
21// bit definitions
22
23// INTCSR bits
24enum {
25 OUTBOX_EMPTY_INTR_BIT = 0x10, // enable outbox empty interrupt
26 INBOX_FULL_INTR_BIT = 0x1000, // enable inbox full interrupt
27 INBOX_INTR_CS_BIT = 0x20000, // read, or write clear inbox full interrupt
28 INTR_ASSERTED_BIT = 0x800000, // read only, interrupt asserted
29};
30
31// select byte 0 to 3 of incoming mailbox
32extern inline int INBOX_BYTE_BITS(unsigned int byte)
33{
34 return (byte & 0x3) << 8;
35};
36
37// select incoming mailbox 0 to 3
38extern inline int INBOX_SELECT_BITS(unsigned int mailbox)
39{
40 return (mailbox & 0x3) << 10;
41};
42
43// select byte 0 to 3 of outgoing mailbox
44extern inline int OUTBOX_BYTE_BITS(unsigned int byte)
45{
46 return (byte & 0x3);
47};
48
49// select outgoing mailbox 0 to 3
50extern inline int OUTBOX_SELECT_BITS(unsigned int mailbox)
51{
52 return (mailbox & 0x3) << 2;
53};
54
55// BMCSR bits
56enum {
57 MBOX_FLAGS_RESET_BIT = 0x08000000, // resets mailbox empty/full flags
58};
59