blob: d8d78bdc7fa5e9d70398aa2a4690afec2de76082 (
plain)
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
|
# This is the config for an Allwinner V3/V3s (sun8iw8).
#
# Notes:
# - Single core ARM Cortex-A7 with a maximum frequency of 1.2 GHz.
# - Thumb-2 Technology
# - Support NEON Advanced SIMD(Single Instruction Multiple Data)instruction
# for acceleration of media and signal processing functions
# - Support Large Physical Address Extensions(LPAE)
# - VFPv4 Floating Point Unit
# - 32KB L1 Instruction cache and 32KB L1 Data cache
# - 128KB L2 cache
# - has some integrated DDR2 RAM.
#
# Pins related for debug and bootstrap:
# JTAG
# JTAG_TMS PF0, SDC0_D1
# JTAG_TDI PF1, SDC0_D0
# JTAG_TDO PF3, SDC0_CMD
# JTAG_TCK PF5, SDC0_D2
# UART
# None of UART ports seems to be enabled by ROM.
# UART0_TX PF2, SDC0_CLK Per default disabled
# UART0_RX PF4, SDC0_D3 Per default disabled
# UART1_TX PE21 Per default disabled
# UART1_RX PE22 Per default disabled
# UART2_TX PB0 Per default disabled
# UART2_RX PB1 Per default disabled
#
# JTAG is enabled by default after power on on listed JTAG_* pins. So far the
# boot sequence is:
# Time Action
# 0000ms Power ON
# 0200ms JTAG enabled
# 0220ms JTAG pins switched to SD mode
#
# The time frame of 20ms can be not enough to init and halt the CPU. In this
# case I would recommend to set: "adapter speed 15000"
# To get more or less precise timings, the board should provide reset pin,
# or some bench power supply with remote function. In my case I used
# EEZ H24005 with this command to power on and halt the target:
# "exec echo "*TRG" > /dev/ttyACM0; sleep 220; reset halt"
# After this it is possible to enable JTAG mode again from boot loader or OS.
# Following DAPs are available:
# dap[0]->MEM-AP AHB
# dap[1]->MEM-AP APB->CA7[0]
#
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME v3s
}
if { [info exists DAP_TAPID] } {
set _DAP_TAPID $DAP_TAPID
} else {
set _DAP_TAPID 0x5ba00477
}
# No NRST or SRST is present on the SoC. Boards may provide
# some sort of Power cycle reset for complete board or SoC.
# For this case we provide srst_pulls_trst so the board config
# only needs to set srst_only.
reset_config none srst_pulls_trst
jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x01 -irmask 0x0f \
-expected-id $_DAP_TAPID
# Add Cortex A7 core
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_a -chain-position $_CHIPNAME.dap
|
