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-rw-r--r--arch/blackfin/mach-bf527/head.S289
1 files changed, 0 insertions, 289 deletions
diff --git a/arch/blackfin/mach-bf527/head.S b/arch/blackfin/mach-bf527/head.S
index fe05cc1ef174..c3334cc5bcb7 100644
--- a/arch/blackfin/mach-bf527/head.S
+++ b/arch/blackfin/mach-bf527/head.S
@@ -30,293 +30,11 @@
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>
34
35#ifdef CONFIG_BFIN_KERNEL_CLOCK 33#ifdef 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
48ENTRY(__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 /* Anomaly 05000125 */
110#if ANOMALY_05000125
111 CLI R2;
112 SSYNC;
113#endif
114 [p0] = R0;
115 SSYNC;
116#if ANOMALY_05000125
117 STI R2;
118#endif
119
120 /* Turn off the dcache */
121 p0.l = LO(DMEM_CONTROL);
122 p0.h = HI(DMEM_CONTROL);
123 R1 = [p0];
124 R0 = ~ENDCPLB;
125 R0 = R0 & R1;
126
127 /* Anomaly 05000125 */
128#if ANOMALY_05000125
129 CLI R2;
130 SSYNC;
131#endif
132 [p0] = R0;
133 SSYNC;
134#if ANOMALY_05000125
135 STI R2;
136#endif
137
138
139#if defined(CONFIG_BF527)
140 p0.h = hi(EMAC_SYSTAT);
141 p0.l = lo(EMAC_SYSTAT);
142 R0.h = 0xFFFF; /* Clear EMAC Interrupt Status bits */
143 R0.l = 0xFFFF;
144 [P0] = R0;
145 SSYNC;
146#endif
147
148 /* Initialise UART - when booting from u-boot, the UART is not disabled
149 * so if we dont initalize here, our serial console gets hosed */
150 p0.h = hi(UART1_LCR);
151 p0.l = lo(UART1_LCR);
152 r0 = 0x0(Z);
153 w[p0] = r0.L; /* To enable DLL writes */
154 ssync;
155
156 p0.h = hi(UART1_DLL);
157 p0.l = lo(UART1_DLL);
158 r0 = 0x0(Z);
159 w[p0] = r0.L;
160 ssync;
161
162 p0.h = hi(UART1_DLH);
163 p0.l = lo(UART1_DLH);
164 r0 = 0x00(Z);
165 w[p0] = r0.L;
166 ssync;
167
168 p0.h = hi(UART1_GCTL);
169 p0.l = lo(UART1_GCTL);
170 r0 = 0x0(Z);
171 w[p0] = r0.L; /* To enable UART clock */
172 ssync;
173
174 /* Initialize stack pointer */
175 sp.l = lo(INITIAL_STACK);
176 sp.h = hi(INITIAL_STACK);
177 fp = sp;
178 usp = sp;
179
180#ifdef CONFIG_EARLY_PRINTK
181 SP += -12;
182 call _init_early_exception_vectors;
183 SP += 12;
184#endif
185
186 /* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
187 call _bf53x_relocate_l1_mem;
188#ifdef CONFIG_BFIN_KERNEL_CLOCK
189 call _start_dma_code;
190#endif
191
192 /* Code for initializing Async memory banks */
193
194 p2.h = hi(EBIU_AMBCTL1);
195 p2.l = lo(EBIU_AMBCTL1);
196 r0.h = hi(AMBCTL1VAL);
197 r0.l = lo(AMBCTL1VAL);
198 [p2] = r0;
199 ssync;
200
201 p2.h = hi(EBIU_AMBCTL0);
202 p2.l = lo(EBIU_AMBCTL0);
203 r0.h = hi(AMBCTL0VAL);
204 r0.l = lo(AMBCTL0VAL);
205 [p2] = r0;
206 ssync;
207
208 p2.h = hi(EBIU_AMGCTL);
209 p2.l = lo(EBIU_AMGCTL);
210 r0 = AMGCTLVAL;
211 w[p2] = r0;
212 ssync;
213
214 /* This section keeps the processor in supervisor mode
215 * during kernel boot. Switches to user mode at end of boot.
216 * See page 3-9 of Hardware Reference manual for documentation.
217 */
218
219 /* EVT15 = _real_start */
220
221 p0.l = lo(EVT15);
222 p0.h = hi(EVT15);
223 p1.l = _real_start;
224 p1.h = _real_start;
225 [p0] = p1;
226 csync;
227
228 p0.l = lo(IMASK);
229 p0.h = hi(IMASK);
230 p1.l = IMASK_IVG15;
231 p1.h = 0x0;
232 [p0] = p1;
233 csync;
234
235 raise 15;
236 p0.l = .LWAIT_HERE;
237 p0.h = .LWAIT_HERE;
238 reti = p0;
239#if ANOMALY_05000281
240 nop; nop; nop;
241#endif
242 rti;
243
244.LWAIT_HERE:
245 jump .LWAIT_HERE;
246ENDPROC(__start)
247
248ENTRY(_real_start)
249 [ -- sp ] = reti;
250 p0.l = lo(WDOG_CTL);
251 p0.h = hi(WDOG_CTL);
252 r0 = 0xAD6(z);
253 w[p0] = r0; /* watchdog off for now */
254 ssync;
255
256 /* Code update for BSS size == 0
257 * Zero out the bss region.
258 */
259
260 p1.l = ___bss_start;
261 p1.h = ___bss_start;
262 p2.l = ___bss_stop;
263 p2.h = ___bss_stop;
264 r0 = 0;
265 p2 -= p1;
266 lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
267.L_clear_bss:
268 B[p1++] = r0;
269
270 /* In case there is a NULL pointer reference
271 * Zero out region before stext
272 */
273
274 p1.l = 0x0;
275 p1.h = 0x0;
276 r0.l = __stext;
277 r0.h = __stext;
278 r0 = r0 >> 1;
279 p2 = r0;
280 r0 = 0;
281 lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
282.L_clear_zero:
283 W[p1++] = r0;
284
285 /* pass the uboot arguments to the global value command line */
286 R0 = R7;
287 call _cmdline_init;
288
289 p1.l = __rambase;
290 p1.h = __rambase;
291 r0.l = __sdata;
292 r0.h = __sdata;
293 [p1] = r0;
294
295 p1.l = __ramstart;
296 p1.h = __ramstart;
297 p3.l = ___bss_stop;
298 p3.h = ___bss_stop;
299
300 r1 = p3;
301 [p1] = r1;
302
303 /*
304 * load the current thread pointer and stack
305 */
306 r1.l = _init_thread_union;
307 r1.h = _init_thread_union;
308
309 r2.l = 0x2000;
310 r2.h = 0x0000;
311 r1 = r1 + r2;
312 sp = r1;
313 usp = sp;
314 fp = sp;
315 jump.l _start_kernel;
316ENDPROC(_real_start)
317
318__FINIT
319
320.section .l1.text 38.section .l1.text
321#ifdef CONFIG_BFIN_KERNEL_CLOCK 39#ifdef CONFIG_BFIN_KERNEL_CLOCK
322ENTRY(_start_dma_code) 40ENTRY(_start_dma_code)
@@ -420,13 +138,6 @@ ENTRY(_start_dma_code)
420 [P2] = R1; 138 [P2] = R1;
421 SSYNC; 139 SSYNC;
422 140
423 p0.h = hi(SIC_IWR0);
424 p0.l = lo(SIC_IWR0);
425 r0.l = lo(IWR_ENABLE_ALL);
426 r0.h = hi(IWR_ENABLE_ALL);
427 [p0] = r0;
428 SSYNC;
429
430 RTS; 141 RTS;
431ENDPROC(_start_dma_code) 142ENDPROC(_start_dma_code)
432#endif /* CONFIG_BFIN_KERNEL_CLOCK */ 143#endif /* CONFIG_BFIN_KERNEL_CLOCK */