1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "internal.h"
#include "task.h"
#include "registers.h"
#define DMEM_NUM_WORDS 1024
#define IMEM_NUM_WORDS 1024
static task_id_t my_task_id;
void dcrypto_init(void)
{
int i;
volatile uint32_t *ptr;
/* Enable PMU. */
REG_WRITE_MLV(GR_PMU_PERICLKSET0, GC_PMU_PERICLKSET0_DCRYPTO0_CLK_MASK,
GC_PMU_PERICLKSET0_DCRYPTO0_CLK_LSB, 1);
/* Reset. */
REG_WRITE_MLV(GR_PMU_RST0, GC_PMU_RST0_DCRYPTO0_MASK,
GC_PMU_RST0_DCRYPTO0_LSB, 0);
/* Turn off random nops (for accurate measuring here). */
/* TODO(ngm): enable for production. */
GREG32(CRYPTO, RAND_STALL_CTL) = 0;
/* Initialize DMEM. */
ptr = GREG32_ADDR(CRYPTO, DMEM_DUMMY);
for (i = 0; i < DMEM_NUM_WORDS; ++i)
*ptr++ = 0xdddddddd;
/* Initialize IMEM. */
ptr = GREG32_ADDR(CRYPTO, IMEM_DUMMY);
for (i = 0; i < IMEM_NUM_WORDS; ++i)
*ptr++ = 0xdddddddd;
GREG32(CRYPTO, INT_STATE) = -1; /* Reset all the status bits. */
GREG32(CRYPTO, INT_ENABLE) = -1; /* Enable all status bits. */
my_task_id = task_get_current();
task_enable_irq(GC_IRQNUM_CRYPTO0_HOST_CMD_DONE_INT);
/* Reset. */
GREG32(CRYPTO, CONTROL) = 1;
GREG32(CRYPTO, CONTROL) = 0;
}
#define DCRYPTO_CALL_TIMEOUT_US (700 * 1000)
#define TASK_EVENT_DCRYPTO_DONE TASK_EVENT_CUSTOM(1)
uint32_t dcrypto_call(uint32_t adr)
{
uint32_t event;
do {
/* Reset all the status bits. */
GREG32(CRYPTO, INT_STATE) = -1;
} while (GREG32(CRYPTO, INT_STATE) & 3);
GREG32(CRYPTO, HOST_CMD) = 0x08000000 + adr; /* Call imem:adr. */
event = task_wait_event_mask(TASK_EVENT_DCRYPTO_DONE,
DCRYPTO_CALL_TIMEOUT_US);
/* TODO(ngm): switch return value to an enum. */
switch (event) {
case TASK_EVENT_DCRYPTO_DONE:
return 1;
default:
return 0;
}
}
void __keep dcrypto_done_interrupt(void)
{
GREG32(CRYPTO, INT_STATE) = GC_CRYPTO_INT_STATE_HOST_CMD_DONE_MASK;
task_clear_pending_irq(GC_IRQNUM_CRYPTO0_HOST_CMD_DONE_INT);
task_set_event(my_task_id, TASK_EVENT_DCRYPTO_DONE, 0);
}
DECLARE_IRQ(GC_IRQNUM_CRYPTO0_HOST_CMD_DONE_INT, dcrypto_done_interrupt, 1);
void dcrypto_imem_load(size_t offset, const uint32_t *opcodes,
size_t n_opcodes)
{
size_t i;
volatile uint32_t *ptr = GREG32_ADDR(CRYPTO, IMEM_DUMMY);
ptr += offset;
for (i = 0; i < n_opcodes; ++i)
ptr[i] = opcodes[i];
}
void dcrypto_dmem_load(size_t offset, const void *words, size_t n_words)
{
size_t i;
volatile uint32_t *ptr = GREG32_ADDR(CRYPTO, DMEM_DUMMY);
const uint32_t *src = (const uint32_t *) words;
struct access_helper *word_accessor = (struct access_helper *) src;
ptr += offset * 8; /* Offset is in 256 bit addresses. */
for (i = 0; i < n_words; ++i) {
/*
* The implementation of memcpy makes unaligned writes if src
* is unaligned. DMEM on the other hand requires writes to be
* aligned, so do a word-by-word copy manually here.
*/
ptr[i] = word_accessor[i].udata;
}
}
|
