diff options
Diffstat (limited to 'arch/blackfin/mach-bf561/head.S')
-rw-r--r-- | arch/blackfin/mach-bf561/head.S | 275 |
1 files changed, 2 insertions, 273 deletions
diff --git a/arch/blackfin/mach-bf561/head.S b/arch/blackfin/mach-bf561/head.S index cf1a2dff01e7..c7a81e34703d 100644 --- a/arch/blackfin/mach-bf561/head.S +++ b/arch/blackfin/mach-bf561/head.S | |||
@@ -30,284 +30,13 @@ | |||
30 | #include <linux/linkage.h> | 30 | #include <linux/linkage.h> |
31 | #include <linux/init.h> | 31 | #include <linux/init.h> |
32 | #include <asm/blackfin.h> | 32 | #include <asm/blackfin.h> |
33 | #include <asm/trace.h> | 33 | #ifdef CONFIG_BFIN_KERNEL_CLOCK |
34 | |||
35 | #if CONFIG_BFIN_KERNEL_CLOCK | ||
36 | #include <asm/mach-common/clocks.h> | 34 | #include <asm/mach-common/clocks.h> |
37 | #include <asm/mach/mem_init.h> | 35 | #include <asm/mach/mem_init.h> |
38 | #endif | 36 | #endif |
39 | 37 | ||
40 | .extern ___bss_stop | ||
41 | .extern ___bss_start | ||
42 | .extern _bf53x_relocate_l1_mem | ||
43 | |||
44 | #define INITIAL_STACK 0xFFB01000 | ||
45 | |||
46 | __INIT | ||
47 | |||
48 | ENTRY(__start) | ||
49 | /* R0: argument of command line string, passed from uboot, save it */ | ||
50 | R7 = R0; | ||
51 | /* Enable Cycle Counter and Nesting Of Interrupts */ | ||
52 | #ifdef CONFIG_BFIN_SCRATCH_REG_CYCLES | ||
53 | R0 = SYSCFG_SNEN; | ||
54 | #else | ||
55 | R0 = SYSCFG_SNEN | SYSCFG_CCEN; | ||
56 | #endif | ||
57 | SYSCFG = R0; | ||
58 | R0 = 0; | ||
59 | |||
60 | /* Clear Out All the data and pointer Registers */ | ||
61 | R1 = R0; | ||
62 | R2 = R0; | ||
63 | R3 = R0; | ||
64 | R4 = R0; | ||
65 | R5 = R0; | ||
66 | R6 = R0; | ||
67 | |||
68 | P0 = R0; | ||
69 | P1 = R0; | ||
70 | P2 = R0; | ||
71 | P3 = R0; | ||
72 | P4 = R0; | ||
73 | P5 = R0; | ||
74 | |||
75 | LC0 = r0; | ||
76 | LC1 = r0; | ||
77 | L0 = r0; | ||
78 | L1 = r0; | ||
79 | L2 = r0; | ||
80 | L3 = r0; | ||
81 | |||
82 | /* Clear Out All the DAG Registers */ | ||
83 | B0 = r0; | ||
84 | B1 = r0; | ||
85 | B2 = r0; | ||
86 | B3 = r0; | ||
87 | |||
88 | I0 = r0; | ||
89 | I1 = r0; | ||
90 | I2 = r0; | ||
91 | I3 = r0; | ||
92 | |||
93 | M0 = r0; | ||
94 | M1 = r0; | ||
95 | M2 = r0; | ||
96 | M3 = r0; | ||
97 | |||
98 | trace_buffer_init(p0,r0); | ||
99 | P0 = R1; | ||
100 | R0 = R1; | ||
101 | |||
102 | /* Turn off the icache */ | ||
103 | p0.l = LO(IMEM_CONTROL); | ||
104 | p0.h = HI(IMEM_CONTROL); | ||
105 | R1 = [p0]; | ||
106 | R0 = ~ENICPLB; | ||
107 | R0 = R0 & R1; | ||
108 | |||
109 | #if ANOMALY_05000125 | ||
110 | CLI R2; | ||
111 | SSYNC; | ||
112 | #endif | ||
113 | [p0] = R0; | ||
114 | SSYNC; | ||
115 | #if ANOMALY_05000125 | ||
116 | STI R2; | ||
117 | #endif | ||
118 | |||
119 | /* Turn off the dcache */ | ||
120 | p0.l = LO(DMEM_CONTROL); | ||
121 | p0.h = HI(DMEM_CONTROL); | ||
122 | R1 = [p0]; | ||
123 | R0 = ~ENDCPLB; | ||
124 | R0 = R0 & R1; | ||
125 | |||
126 | /* Anomaly 05000125 */ | ||
127 | #if ANOMALY_05000125 | ||
128 | CLI R2; | ||
129 | SSYNC; | ||
130 | #endif | ||
131 | [p0] = R0; | ||
132 | SSYNC; | ||
133 | #if ANOMALY_05000125 | ||
134 | STI R2; | ||
135 | #endif | ||
136 | |||
137 | /* Initialise UART - when booting from u-boot, the UART is not disabled | ||
138 | * so if we dont initalize here, our serial console gets hosed */ | ||
139 | p0.h = hi(BFIN_UART_LCR); | ||
140 | p0.l = lo(BFIN_UART_LCR); | ||
141 | r0 = 0x0(Z); | ||
142 | w[p0] = r0.L; /* To enable DLL writes */ | ||
143 | ssync; | ||
144 | |||
145 | p0.h = hi(BFIN_UART_DLL); | ||
146 | p0.l = lo(BFIN_UART_DLL); | ||
147 | r0 = 0x0(Z); | ||
148 | w[p0] = r0.L; | ||
149 | ssync; | ||
150 | |||
151 | p0.h = hi(BFIN_UART_DLH); | ||
152 | p0.l = lo(BFIN_UART_DLH); | ||
153 | r0 = 0x00(Z); | ||
154 | w[p0] = r0.L; | ||
155 | ssync; | ||
156 | |||
157 | p0.h = hi(BFIN_UART_GCTL); | ||
158 | p0.l = lo(BFIN_UART_GCTL); | ||
159 | r0 = 0x0(Z); | ||
160 | w[p0] = r0.L; /* To enable UART clock */ | ||
161 | ssync; | ||
162 | |||
163 | /* Initialize stack pointer */ | ||
164 | sp.l = lo(INITIAL_STACK); | ||
165 | sp.h = hi(INITIAL_STACK); | ||
166 | fp = sp; | ||
167 | usp = sp; | ||
168 | |||
169 | #ifdef CONFIG_EARLY_PRINTK | ||
170 | SP += -12; | ||
171 | call _init_early_exception_vectors; | ||
172 | SP += 12; | ||
173 | #endif | ||
174 | |||
175 | /* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */ | ||
176 | call _bf53x_relocate_l1_mem; | ||
177 | #if CONFIG_BFIN_KERNEL_CLOCK | ||
178 | call _start_dma_code; | ||
179 | #endif | ||
180 | |||
181 | /* Code for initializing Async memory banks */ | ||
182 | |||
183 | p2.h = hi(EBIU_AMBCTL1); | ||
184 | p2.l = lo(EBIU_AMBCTL1); | ||
185 | r0.h = hi(AMBCTL1VAL); | ||
186 | r0.l = lo(AMBCTL1VAL); | ||
187 | [p2] = r0; | ||
188 | ssync; | ||
189 | |||
190 | p2.h = hi(EBIU_AMBCTL0); | ||
191 | p2.l = lo(EBIU_AMBCTL0); | ||
192 | r0.h = hi(AMBCTL0VAL); | ||
193 | r0.l = lo(AMBCTL0VAL); | ||
194 | [p2] = r0; | ||
195 | ssync; | ||
196 | |||
197 | p2.h = hi(EBIU_AMGCTL); | ||
198 | p2.l = lo(EBIU_AMGCTL); | ||
199 | r0 = AMGCTLVAL; | ||
200 | w[p2] = r0; | ||
201 | ssync; | ||
202 | |||
203 | /* This section keeps the processor in supervisor mode | ||
204 | * during kernel boot. Switches to user mode at end of boot. | ||
205 | * See page 3-9 of Hardware Reference manual for documentation. | ||
206 | */ | ||
207 | |||
208 | /* EVT15 = _real_start */ | ||
209 | |||
210 | p0.l = lo(EVT15); | ||
211 | p0.h = hi(EVT15); | ||
212 | p1.l = _real_start; | ||
213 | p1.h = _real_start; | ||
214 | [p0] = p1; | ||
215 | csync; | ||
216 | |||
217 | p0.l = lo(IMASK); | ||
218 | p0.h = hi(IMASK); | ||
219 | p1.l = IMASK_IVG15; | ||
220 | p1.h = 0x0; | ||
221 | [p0] = p1; | ||
222 | csync; | ||
223 | |||
224 | raise 15; | ||
225 | p0.l = .LWAIT_HERE; | ||
226 | p0.h = .LWAIT_HERE; | ||
227 | reti = p0; | ||
228 | #if ANOMALY_05000281 | ||
229 | nop; nop; nop; | ||
230 | #endif | ||
231 | rti; | ||
232 | |||
233 | .LWAIT_HERE: | ||
234 | jump .LWAIT_HERE; | ||
235 | ENDPROC(__start) | ||
236 | |||
237 | ENTRY(_real_start) | ||
238 | [ -- sp ] = reti; | ||
239 | p0.l = lo(WDOGA_CTL); | ||
240 | p0.h = hi(WDOGA_CTL); | ||
241 | r0 = 0xAD6(z); | ||
242 | w[p0] = r0; /* watchdog off for now */ | ||
243 | ssync; | ||
244 | |||
245 | /* Code update for BSS size == 0 | ||
246 | * Zero out the bss region. | ||
247 | */ | ||
248 | |||
249 | p1.l = ___bss_start; | ||
250 | p1.h = ___bss_start; | ||
251 | p2.l = ___bss_stop; | ||
252 | p2.h = ___bss_stop; | ||
253 | r0 = 0; | ||
254 | p2 -= p1; | ||
255 | lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2; | ||
256 | .L_clear_bss: | ||
257 | B[p1++] = r0; | ||
258 | |||
259 | /* In case there is a NULL pointer reference | ||
260 | * Zero out region before stext | ||
261 | */ | ||
262 | |||
263 | p1.l = 0x0; | ||
264 | p1.h = 0x0; | ||
265 | r0.l = __stext; | ||
266 | r0.h = __stext; | ||
267 | r0 = r0 >> 1; | ||
268 | p2 = r0; | ||
269 | r0 = 0; | ||
270 | lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2; | ||
271 | .L_clear_zero: | ||
272 | W[p1++] = r0; | ||
273 | |||
274 | /* pass the uboot arguments to the global value command line */ | ||
275 | R0 = R7; | ||
276 | call _cmdline_init; | ||
277 | |||
278 | p1.l = __rambase; | ||
279 | p1.h = __rambase; | ||
280 | r0.l = __sdata; | ||
281 | r0.h = __sdata; | ||
282 | [p1] = r0; | ||
283 | |||
284 | p1.l = __ramstart; | ||
285 | p1.h = __ramstart; | ||
286 | p3.l = ___bss_stop; | ||
287 | p3.h = ___bss_stop; | ||
288 | |||
289 | r1 = p3; | ||
290 | [p1] = r1; | ||
291 | |||
292 | /* | ||
293 | * load the current thread pointer and stack | ||
294 | */ | ||
295 | r1.l = _init_thread_union; | ||
296 | r1.h = _init_thread_union; | ||
297 | |||
298 | r2.l = 0x2000; | ||
299 | r2.h = 0x0000; | ||
300 | r1 = r1 + r2; | ||
301 | sp = r1; | ||
302 | usp = sp; | ||
303 | fp = sp; | ||
304 | jump.l _start_kernel; | ||
305 | ENDPROC(_real_start) | ||
306 | |||
307 | __FINIT | ||
308 | |||
309 | .section .l1.text | 38 | .section .l1.text |
310 | #if CONFIG_BFIN_KERNEL_CLOCK | 39 | #ifdef CONFIG_BFIN_KERNEL_CLOCK |
311 | ENTRY(_start_dma_code) | 40 | ENTRY(_start_dma_code) |
312 | p0.h = hi(SICA_IWR0); | 41 | p0.h = hi(SICA_IWR0); |
313 | p0.l = lo(SICA_IWR0); | 42 | p0.l = lo(SICA_IWR0); |