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Gabor Juhos5a4dcfa2013-05-22 03:57:37 +00001/*
2 * Copyright (C) 2013 Gabor Juhos <juhosg@openwrt.org>
3 *
Tom Rini0b179982013-07-24 09:34:30 -04004 * SPDX-License-Identifier: GPL-2.0
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +00005 */
6
Gabor Juhosac129842013-05-22 03:57:41 +00007#include <config.h>
8#include <gt64120.h>
Paul Burtonbaf37f02013-11-08 11:18:50 +00009#include <msc01.h>
10#include <pci.h>
Gabor Juhosac129842013-05-22 03:57:41 +000011
12#include <asm/addrspace.h>
Paul Burton0f832b92016-05-26 14:49:36 +010013#include <asm/asm.h>
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +000014#include <asm/regdef.h>
Gabor Juhosac129842013-05-22 03:57:41 +000015#include <asm/malta.h>
Paul Burtone174bd72013-11-08 11:18:54 +000016#include <asm/mipsregs.h>
Gabor Juhosac129842013-05-22 03:57:41 +000017
18#ifdef CONFIG_SYS_BIG_ENDIAN
19#define CPU_TO_GT32(_x) ((_x))
20#else
21#define CPU_TO_GT32(_x) ( \
22 (((_x) & 0xff) << 24) | (((_x) & 0xff00) << 8) | \
23 (((_x) & 0xff0000) >> 8) | (((_x) & 0xff000000) >> 24))
24#endif
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +000025
26 .text
27 .set noreorder
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +000028
29 .globl lowlevel_init
30lowlevel_init:
Paul Burtone174bd72013-11-08 11:18:54 +000031 /* disable any L2 cache for now */
32 sync
33 mfc0 t0, CP0_CONFIG, 2
34 ori t0, t0, 0x1 << 12
35 mtc0 t0, CP0_CONFIG, 2
36
Paul Burtonbaf37f02013-11-08 11:18:50 +000037 /* detect the core card */
Paul Burton0f832b92016-05-26 14:49:36 +010038 PTR_LI t0, CKSEG1ADDR(MALTA_REVISION)
Paul Burtonbaf37f02013-11-08 11:18:50 +000039 lw t0, 0(t0)
40 srl t0, t0, MALTA_REVISION_CORID_SHF
41 andi t0, t0, (MALTA_REVISION_CORID_MSK >> \
42 MALTA_REVISION_CORID_SHF)
43
44 /* core cards using the gt64120 system controller */
45 li t1, MALTA_REVISION_CORID_CORE_LV
46 beq t0, t1, _gt64120
47
48 /* core cards using the MSC01 system controller */
49 li t1, MALTA_REVISION_CORID_CORE_FPGA6
50 beq t0, t1, _msc01
51 nop
52
53 /* unknown system controller */
54 b .
55 nop
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +000056
Gabor Juhosac129842013-05-22 03:57:41 +000057 /*
58 * Load BAR registers of GT64120 as done by YAMON
59 *
60 * based on a patch sent by Antony Pavlov <antonynpavlov@gmail.com>
61 * to the barebox mailing list.
62 * The subject of the original patch:
63 * 'MIPS: qemu-malta: add YAMON-style GT64120 memory map'
64 * URL:
65 * http://www.mail-archive.com/barebox@lists.infradead.org/msg06128.html
66 *
67 * based on write_bootloader() in qemu.git/hw/mips_malta.c
68 * see GT64120 manual and qemu.git/hw/gt64xxx.c for details
69 */
Paul Burtonbaf37f02013-11-08 11:18:50 +000070_gt64120:
Gabor Juhosac129842013-05-22 03:57:41 +000071 /* move GT64120 registers from 0x14000000 to 0x1be00000 */
Paul Burton0f832b92016-05-26 14:49:36 +010072 PTR_LI t1, CKSEG1ADDR(GT_DEF_BASE)
Gabor Juhosac129842013-05-22 03:57:41 +000073 li t0, CPU_TO_GT32(0xdf000000)
74 sw t0, GT_ISD_OFS(t1)
75
76 /* setup MEM-to-PCI0 mapping */
Paul Burton0f832b92016-05-26 14:49:36 +010077 PTR_LI t1, CKSEG1ADDR(MALTA_GT_BASE)
Gabor Juhosac129842013-05-22 03:57:41 +000078
79 /* setup PCI0 io window to 0x18000000-0x181fffff */
80 li t0, CPU_TO_GT32(0xc0000000)
81 sw t0, GT_PCI0IOLD_OFS(t1)
82 li t0, CPU_TO_GT32(0x40000000)
83 sw t0, GT_PCI0IOHD_OFS(t1)
84
85 /* setup PCI0 mem windows */
86 li t0, CPU_TO_GT32(0x80000000)
87 sw t0, GT_PCI0M0LD_OFS(t1)
88 li t0, CPU_TO_GT32(0x3f000000)
89 sw t0, GT_PCI0M0HD_OFS(t1)
90
91 li t0, CPU_TO_GT32(0xc1000000)
92 sw t0, GT_PCI0M1LD_OFS(t1)
93 li t0, CPU_TO_GT32(0x5e000000)
94 sw t0, GT_PCI0M1HD_OFS(t1)
95
Gabor Juhos5a4dcfa2013-05-22 03:57:37 +000096 jr ra
97 nop
Paul Burtonbaf37f02013-11-08 11:18:50 +000098
99 /*
100 *
101 */
102_msc01:
103 /* setup peripheral bus controller clock divide */
Paul Burton0f832b92016-05-26 14:49:36 +0100104 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_PBC_BASE)
Paul Burtonbaf37f02013-11-08 11:18:50 +0000105 li t1, 0x1 << MSC01_PBC_CLKCFG_SHF
106 sw t1, MSC01_PBC_CLKCFG_OFS(t0)
107
108 /* tweak peripheral bus controller timings */
109 li t1, (0x1 << MSC01_PBC_CS0TIM_CDT_SHF) | \
110 (0x1 << MSC01_PBC_CS0TIM_CAT_SHF)
111 sw t1, MSC01_PBC_CS0TIM_OFS(t0)
112 li t1, (0x0 << MSC01_PBC_CS0RW_RDT_SHF) | \
113 (0x2 << MSC01_PBC_CS0RW_RAT_SHF) | \
114 (0x0 << MSC01_PBC_CS0RW_WDT_SHF) | \
115 (0x2 << MSC01_PBC_CS0RW_WAT_SHF)
116 sw t1, MSC01_PBC_CS0RW_OFS(t0)
117 lw t1, MSC01_PBC_CS0CFG_OFS(t0)
118 li t2, MSC01_PBC_CS0CFG_DTYP_MSK
119 and t1, t2
120 ori t1, (0x0 << MSC01_PBC_CS0CFG_ADM_SHF) | \
121 (0x3 << MSC01_PBC_CS0CFG_WSIDLE_SHF) | \
122 (0x10 << MSC01_PBC_CS0CFG_WS_SHF)
123 sw t1, MSC01_PBC_CS0CFG_OFS(t0)
124
125 /* setup basic address decode */
Paul Burton0f832b92016-05-26 14:49:36 +0100126 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_BIU_BASE)
Paul Burtonbaf37f02013-11-08 11:18:50 +0000127 li t1, 0x0
128 li t2, -CONFIG_SYS_MEM_SIZE
129 sw t1, MSC01_BIU_MCBAS1L_OFS(t0)
130 sw t2, MSC01_BIU_MCMSK1L_OFS(t0)
131 sw t1, MSC01_BIU_MCBAS2L_OFS(t0)
132 sw t2, MSC01_BIU_MCMSK2L_OFS(t0)
133
134 /* initialise IP1 - unused */
135 li t1, MALTA_MSC01_IP1_BASE
136 li t2, -MALTA_MSC01_IP1_SIZE
137 sw t1, MSC01_BIU_IP1BAS1L_OFS(t0)
138 sw t2, MSC01_BIU_IP1MSK1L_OFS(t0)
139 sw t1, MSC01_BIU_IP1BAS2L_OFS(t0)
140 sw t2, MSC01_BIU_IP1MSK2L_OFS(t0)
141
142 /* initialise IP2 - PCI */
143 li t1, MALTA_MSC01_IP2_BASE1
144 li t2, -MALTA_MSC01_IP2_SIZE1
145 sw t1, MSC01_BIU_IP2BAS1L_OFS(t0)
146 sw t2, MSC01_BIU_IP2MSK1L_OFS(t0)
147 li t1, MALTA_MSC01_IP2_BASE2
148 li t2, -MALTA_MSC01_IP2_SIZE2
149 sw t1, MSC01_BIU_IP2BAS2L_OFS(t0)
150 sw t2, MSC01_BIU_IP2MSK2L_OFS(t0)
151
152 /* initialise IP3 - peripheral bus controller */
153 li t1, MALTA_MSC01_IP3_BASE
154 li t2, -MALTA_MSC01_IP3_SIZE
155 sw t1, MSC01_BIU_IP3BAS1L_OFS(t0)
156 sw t2, MSC01_BIU_IP3MSK1L_OFS(t0)
157 sw t1, MSC01_BIU_IP3BAS2L_OFS(t0)
158 sw t2, MSC01_BIU_IP3MSK2L_OFS(t0)
159
160 /* setup PCI memory */
Paul Burton0f832b92016-05-26 14:49:36 +0100161 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_PCI_BASE)
Paul Burtonbaf37f02013-11-08 11:18:50 +0000162 li t1, MALTA_MSC01_PCIMEM_BASE
163 li t2, (-MALTA_MSC01_PCIMEM_SIZE) & MSC01_PCI_SC2PMMSKL_MSK_MSK
164 li t3, MALTA_MSC01_PCIMEM_MAP
165 sw t1, MSC01_PCI_SC2PMBASL_OFS(t0)
166 sw t2, MSC01_PCI_SC2PMMSKL_OFS(t0)
167 sw t3, MSC01_PCI_SC2PMMAPL_OFS(t0)
168
169 /* setup PCI I/O */
170 li t1, MALTA_MSC01_PCIIO_BASE
171 li t2, (-MALTA_MSC01_PCIIO_SIZE) & MSC01_PCI_SC2PIOMSKL_MSK_MSK
172 li t3, MALTA_MSC01_PCIIO_MAP
173 sw t1, MSC01_PCI_SC2PIOBASL_OFS(t0)
174 sw t2, MSC01_PCI_SC2PIOMSKL_OFS(t0)
175 sw t3, MSC01_PCI_SC2PIOMAPL_OFS(t0)
176
177 /* setup PCI_BAR0 memory window */
178 li t1, -CONFIG_SYS_MEM_SIZE
179 sw t1, MSC01_PCI_BAR0_OFS(t0)
180
181 /* setup PCI to SysCon/CPU translation */
182 sw t1, MSC01_PCI_P2SCMSKL_OFS(t0)
183 sw zero, MSC01_PCI_P2SCMAPL_OFS(t0)
184
185 /* setup PCI vendor & device IDs */
186 li t1, (PCI_VENDOR_ID_MIPS << MSC01_PCI_HEAD0_VENDORID_SHF) | \
187 (PCI_DEVICE_ID_MIPS_MSC01 << MSC01_PCI_HEAD0_DEVICEID_SHF)
188 sw t1, MSC01_PCI_HEAD0_OFS(t0)
189
190 /* setup PCI subsystem vendor & device IDs */
191 sw t1, MSC01_PCI_HEAD11_OFS(t0)
192
193 /* setup PCI class, revision */
194 li t1, (PCI_CLASS_BRIDGE_HOST << MSC01_PCI_HEAD2_CLASS_SHF) | \
195 (0x1 << MSC01_PCI_HEAD2_REV_SHF)
196 sw t1, MSC01_PCI_HEAD2_OFS(t0)
197
198 /* ensure a sane setup */
199 sw zero, MSC01_PCI_HEAD3_OFS(t0)
200 sw zero, MSC01_PCI_HEAD4_OFS(t0)
201 sw zero, MSC01_PCI_HEAD5_OFS(t0)
202 sw zero, MSC01_PCI_HEAD6_OFS(t0)
203 sw zero, MSC01_PCI_HEAD7_OFS(t0)
204 sw zero, MSC01_PCI_HEAD8_OFS(t0)
205 sw zero, MSC01_PCI_HEAD9_OFS(t0)
206 sw zero, MSC01_PCI_HEAD10_OFS(t0)
207 sw zero, MSC01_PCI_HEAD12_OFS(t0)
208 sw zero, MSC01_PCI_HEAD13_OFS(t0)
209 sw zero, MSC01_PCI_HEAD14_OFS(t0)
210 sw zero, MSC01_PCI_HEAD15_OFS(t0)
211
212 /* setup PCI command register */
213 li t1, (PCI_COMMAND_FAST_BACK | \
214 PCI_COMMAND_SERR | \
215 PCI_COMMAND_PARITY | \
216 PCI_COMMAND_MASTER | \
217 PCI_COMMAND_MEMORY)
218 sw t1, MSC01_PCI_HEAD1_OFS(t0)
219
220 /* setup PCI byte swapping */
221#ifdef CONFIG_SYS_BIG_ENDIAN
222 li t1, (0x1 << MSC01_PCI_SWAP_BAR0_BSWAP_SHF) | \
223 (0x1 << MSC01_PCI_SWAP_IO_BSWAP_SHF)
224 sw t1, MSC01_PCI_SWAP_OFS(t0)
225#else
226 sw zero, MSC01_PCI_SWAP_OFS(t0)
227#endif
228
229 /* enable PCI host configuration cycles */
230 lw t1, MSC01_PCI_CFG_OFS(t0)
231 li t2, MSC01_PCI_CFG_RA_MSK | \
232 MSC01_PCI_CFG_G_MSK | \
233 MSC01_PCI_CFG_EN_MSK
234 or t1, t1, t2
235 sw t1, MSC01_PCI_CFG_OFS(t0)
236
237 jr ra
238 nop