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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rsirq.c (7634B)

      1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
      2/*******************************************************************************
      3 *
      4 * Module Name: rsirq - IRQ resource descriptors
      5 *
      6 ******************************************************************************/
      7
      8#include <acpi/acpi.h>
      9#include "accommon.h"
     10#include "acresrc.h"
     11
     12#define _COMPONENT          ACPI_RESOURCES
     13ACPI_MODULE_NAME("rsirq")
     14
     15/*******************************************************************************
     16 *
     17 * acpi_rs_get_irq
     18 *
     19 ******************************************************************************/
     20struct acpi_rsconvert_info acpi_rs_get_irq[9] = {
     21	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
     22	 ACPI_RS_SIZE(struct acpi_resource_irq),
     23	 ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
     24
     25	/* Get the IRQ mask (bytes 1:2) */
     26
     27	{ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
     28	 AML_OFFSET(irq.irq_mask),
     29	 ACPI_RS_OFFSET(data.irq.interrupt_count)},
     30
     31	/* Set default flags (others are zero) */
     32
     33	{ACPI_RSC_SET8, ACPI_RS_OFFSET(data.irq.triggering),
     34	 ACPI_EDGE_SENSITIVE,
     35	 1},
     36
     37	/* Get the descriptor length (2 or 3 for IRQ descriptor) */
     38
     39	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
     40	 AML_OFFSET(irq.descriptor_type),
     41	 0},
     42
     43	/* All done if no flag byte present in descriptor */
     44
     45	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
     46
     47	/* Get flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
     48
     49	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
     50	 AML_OFFSET(irq.flags),
     51	 0},
     52
     53	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
     54	 AML_OFFSET(irq.flags),
     55	 3},
     56
     57	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.shareable),
     58	 AML_OFFSET(irq.flags),
     59	 4},
     60
     61	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
     62	 AML_OFFSET(irq.flags),
     63	 5}
     64};
     65
     66/*******************************************************************************
     67 *
     68 * acpi_rs_set_irq
     69 *
     70 ******************************************************************************/
     71
     72struct acpi_rsconvert_info acpi_rs_set_irq[14] = {
     73	/* Start with a default descriptor of length 3 */
     74
     75	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
     76	 sizeof(struct aml_resource_irq),
     77	 ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
     78
     79	/* Convert interrupt list to 16-bit IRQ bitmask */
     80
     81	{ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
     82	 AML_OFFSET(irq.irq_mask),
     83	 ACPI_RS_OFFSET(data.irq.interrupt_count)},
     84
     85	/* Set flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
     86
     87	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
     88	 AML_OFFSET(irq.flags),
     89	 0},
     90
     91	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
     92	 AML_OFFSET(irq.flags),
     93	 3},
     94
     95	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.shareable),
     96	 AML_OFFSET(irq.flags),
     97	 4},
     98
     99	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
    100	 AML_OFFSET(irq.flags),
    101	 5},
    102
    103	/*
    104	 * All done if the output descriptor length is required to be 3
    105	 * (i.e., optimization to 2 bytes cannot be attempted)
    106	 */
    107	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
    108	 ACPI_RS_OFFSET(data.irq.descriptor_length),
    109	 3},
    110
    111	/* Set length to 2 bytes (no flags byte) */
    112
    113	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
    114
    115	/*
    116	 * All done if the output descriptor length is required to be 2.
    117	 *
    118	 * TBD: Perhaps we should check for error if input flags are not
    119	 * compatible with a 2-byte descriptor.
    120	 */
    121	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
    122	 ACPI_RS_OFFSET(data.irq.descriptor_length),
    123	 2},
    124
    125	/* Reset length to 3 bytes (descriptor with flags byte) */
    126
    127	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
    128
    129	/*
    130	 * Check if the flags byte is necessary. Not needed if the flags are:
    131	 * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
    132	 */
    133	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
    134	 ACPI_RS_OFFSET(data.irq.triggering),
    135	 ACPI_EDGE_SENSITIVE},
    136
    137	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
    138	 ACPI_RS_OFFSET(data.irq.polarity),
    139	 ACPI_ACTIVE_HIGH},
    140
    141	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
    142	 ACPI_RS_OFFSET(data.irq.shareable),
    143	 ACPI_EXCLUSIVE},
    144
    145	/* We can optimize to a 2-byte irq_no_flags() descriptor */
    146
    147	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
    148};
    149
    150/*******************************************************************************
    151 *
    152 * acpi_rs_convert_ext_irq
    153 *
    154 ******************************************************************************/
    155
    156struct acpi_rsconvert_info acpi_rs_convert_ext_irq[10] = {
    157	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
    158	 ACPI_RS_SIZE(struct acpi_resource_extended_irq),
    159	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
    160
    161	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
    162	 sizeof(struct aml_resource_extended_irq),
    163	 0},
    164
    165	/*
    166	 * Flags: Producer/Consumer[0], Triggering[1], Polarity[2],
    167	 *        Sharing[3], Wake[4]
    168	 */
    169	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
    170	 AML_OFFSET(extended_irq.flags),
    171	 0},
    172
    173	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
    174	 AML_OFFSET(extended_irq.flags),
    175	 1},
    176
    177	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
    178	 AML_OFFSET(extended_irq.flags),
    179	 2},
    180
    181	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.shareable),
    182	 AML_OFFSET(extended_irq.flags),
    183	 3},
    184
    185	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.wake_capable),
    186	 AML_OFFSET(extended_irq.flags),
    187	 4},
    188
    189	/* IRQ Table length (Byte4) */
    190
    191	{ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
    192	 AML_OFFSET(extended_irq.interrupt_count),
    193	 sizeof(u32)},
    194
    195	/* Copy every IRQ in the table, each is 32 bits */
    196
    197	{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
    198	 AML_OFFSET(extended_irq.interrupts[0]),
    199	 0},
    200
    201	/* Optional resource_source (Index and String) */
    202
    203	{ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
    204	 ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
    205	 sizeof(struct aml_resource_extended_irq)}
    206};
    207
    208/*******************************************************************************
    209 *
    210 * acpi_rs_convert_dma
    211 *
    212 ******************************************************************************/
    213
    214struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
    215	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
    216	 ACPI_RS_SIZE(struct acpi_resource_dma),
    217	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
    218
    219	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
    220	 sizeof(struct aml_resource_dma),
    221	 0},
    222
    223	/* Flags: transfer preference, bus mastering, channel speed */
    224
    225	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
    226	 AML_OFFSET(dma.flags),
    227	 0},
    228
    229	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
    230	 AML_OFFSET(dma.flags),
    231	 2},
    232
    233	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
    234	 AML_OFFSET(dma.flags),
    235	 5},
    236
    237	/* DMA channel mask bits */
    238
    239	{ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
    240	 AML_OFFSET(dma.dma_channel_mask),
    241	 ACPI_RS_OFFSET(data.dma.channel_count)}
    242};
    243
    244/*******************************************************************************
    245 *
    246 * acpi_rs_convert_fixed_dma
    247 *
    248 ******************************************************************************/
    249
    250struct acpi_rsconvert_info acpi_rs_convert_fixed_dma[4] = {
    251	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_DMA,
    252	 ACPI_RS_SIZE(struct acpi_resource_fixed_dma),
    253	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_dma)},
    254
    255	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_DMA,
    256	 sizeof(struct aml_resource_fixed_dma),
    257	 0},
    258
    259	/*
    260	 * These fields are contiguous in both the source and destination:
    261	 * request_lines
    262	 * Channels
    263	 */
    264	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_dma.request_lines),
    265	 AML_OFFSET(fixed_dma.request_lines),
    266	 2},
    267
    268	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_dma.width),
    269	 AML_OFFSET(fixed_dma.width),
    270	 1},
    271};