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hw/net: ne2000: Remove the logic of padding short frames in the receive path
[qemu/kevin.git] / hw / misc / aspeed_scu.c
blob83353649064aecd5297fc4dee8212b1087373647
1 /*
2 * ASPEED System Control Unit
3 *
4 * Andrew Jeffery <andrew@aj.id.au>
5 *
6 * Copyright 2016 IBM Corp.
7 *
8 * This code is licensed under the GPL version 2 or later. See
9 * the COPYING file in the top-level directory.
10 */
11
12 #include "qemu/osdep.h"
13 #include "hw/misc/aspeed_scu.h"
14 #include "hw/qdev-properties.h"
15 #include "migration/vmstate.h"
16 #include "qapi/error.h"
17 #include "qapi/visitor.h"
18 #include "qemu/bitops.h"
19 #include "qemu/log.h"
20 #include "qemu/guest-random.h"
21 #include "qemu/module.h"
22 #include "trace.h"
23
24 #define TO_REG(offset) ((offset) >> 2)
25
26 #define PROT_KEY TO_REG(0x00)
27 #define SYS_RST_CTRL TO_REG(0x04)
28 #define CLK_SEL TO_REG(0x08)
29 #define CLK_STOP_CTRL TO_REG(0x0C)
30 #define FREQ_CNTR_CTRL TO_REG(0x10)
31 #define FREQ_CNTR_EVAL TO_REG(0x14)
32 #define IRQ_CTRL TO_REG(0x18)
33 #define D2PLL_PARAM TO_REG(0x1C)
34 #define MPLL_PARAM TO_REG(0x20)
35 #define HPLL_PARAM TO_REG(0x24)
36 #define FREQ_CNTR_RANGE TO_REG(0x28)
37 #define MISC_CTRL1 TO_REG(0x2C)
38 #define PCI_CTRL1 TO_REG(0x30)
39 #define PCI_CTRL2 TO_REG(0x34)
40 #define PCI_CTRL3 TO_REG(0x38)
41 #define SYS_RST_STATUS TO_REG(0x3C)
42 #define SOC_SCRATCH1 TO_REG(0x40)
43 #define SOC_SCRATCH2 TO_REG(0x44)
44 #define MAC_CLK_DELAY TO_REG(0x48)
45 #define MISC_CTRL2 TO_REG(0x4C)
46 #define VGA_SCRATCH1 TO_REG(0x50)
47 #define VGA_SCRATCH2 TO_REG(0x54)
48 #define VGA_SCRATCH3 TO_REG(0x58)
49 #define VGA_SCRATCH4 TO_REG(0x5C)
50 #define VGA_SCRATCH5 TO_REG(0x60)
51 #define VGA_SCRATCH6 TO_REG(0x64)
52 #define VGA_SCRATCH7 TO_REG(0x68)
53 #define VGA_SCRATCH8 TO_REG(0x6C)
54 #define HW_STRAP1 TO_REG(0x70)
55 #define RNG_CTRL TO_REG(0x74)
56 #define RNG_DATA TO_REG(0x78)
57 #define SILICON_REV TO_REG(0x7C)
58 #define PINMUX_CTRL1 TO_REG(0x80)
59 #define PINMUX_CTRL2 TO_REG(0x84)
60 #define PINMUX_CTRL3 TO_REG(0x88)
61 #define PINMUX_CTRL4 TO_REG(0x8C)
62 #define PINMUX_CTRL5 TO_REG(0x90)
63 #define PINMUX_CTRL6 TO_REG(0x94)
64 #define WDT_RST_CTRL TO_REG(0x9C)
65 #define PINMUX_CTRL7 TO_REG(0xA0)
66 #define PINMUX_CTRL8 TO_REG(0xA4)
67 #define PINMUX_CTRL9 TO_REG(0xA8)
68 #define WAKEUP_EN TO_REG(0xC0)
69 #define WAKEUP_CTRL TO_REG(0xC4)
70 #define HW_STRAP2 TO_REG(0xD0)
71 #define FREE_CNTR4 TO_REG(0xE0)
72 #define FREE_CNTR4_EXT TO_REG(0xE4)
73 #define CPU2_CTRL TO_REG(0x100)
74 #define CPU2_BASE_SEG1 TO_REG(0x104)
75 #define CPU2_BASE_SEG2 TO_REG(0x108)
76 #define CPU2_BASE_SEG3 TO_REG(0x10C)
77 #define CPU2_BASE_SEG4 TO_REG(0x110)
78 #define CPU2_BASE_SEG5 TO_REG(0x114)
79 #define CPU2_CACHE_CTRL TO_REG(0x118)
80 #define CHIP_ID0 TO_REG(0x150)
81 #define CHIP_ID1 TO_REG(0x154)
82 #define UART_HPLL_CLK TO_REG(0x160)
83 #define PCIE_CTRL TO_REG(0x180)
84 #define BMC_MMIO_CTRL TO_REG(0x184)
85 #define RELOC_DECODE_BASE1 TO_REG(0x188)
86 #define RELOC_DECODE_BASE2 TO_REG(0x18C)
87 #define MAILBOX_DECODE_BASE TO_REG(0x190)
88 #define SRAM_DECODE_BASE1 TO_REG(0x194)
89 #define SRAM_DECODE_BASE2 TO_REG(0x198)
90 #define BMC_REV TO_REG(0x19C)
91 #define BMC_DEV_ID TO_REG(0x1A4)
92
93 #define AST2600_PROT_KEY TO_REG(0x00)
94 #define AST2600_SILICON_REV TO_REG(0x04)
95 #define AST2600_SILICON_REV2 TO_REG(0x14)
96 #define AST2600_SYS_RST_CTRL TO_REG(0x40)
97 #define AST2600_SYS_RST_CTRL_CLR TO_REG(0x44)
98 #define AST2600_SYS_RST_CTRL2 TO_REG(0x50)
99 #define AST2600_SYS_RST_CTRL2_CLR TO_REG(0x54)
100 #define AST2600_CLK_STOP_CTRL TO_REG(0x80)
101 #define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84)
102 #define AST2600_CLK_STOP_CTRL2 TO_REG(0x90)
103 #define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94)
104 #define AST2600_DEBUG_CTRL TO_REG(0xC8)
105 #define AST2600_DEBUG_CTRL2 TO_REG(0xD8)
106 #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100)
107 #define AST2600_HPLL_PARAM TO_REG(0x200)
108 #define AST2600_HPLL_EXT TO_REG(0x204)
109 #define AST2600_APLL_PARAM TO_REG(0x210)
110 #define AST2600_APLL_EXT TO_REG(0x214)
111 #define AST2600_MPLL_PARAM TO_REG(0x220)
112 #define AST2600_MPLL_EXT TO_REG(0x224)
113 #define AST2600_EPLL_PARAM TO_REG(0x240)
114 #define AST2600_EPLL_EXT TO_REG(0x244)
115 #define AST2600_DPLL_PARAM TO_REG(0x260)
116 #define AST2600_DPLL_EXT TO_REG(0x264)
117 #define AST2600_CLK_SEL TO_REG(0x300)
118 #define AST2600_CLK_SEL2 TO_REG(0x304)
119 #define AST2600_CLK_SEL3 TO_REG(0x308)
120 #define AST2600_CLK_SEL4 TO_REG(0x310)
121 #define AST2600_CLK_SEL5 TO_REG(0x314)
122 #define AST2600_UARTCLK TO_REG(0x338)
123 #define AST2600_HUARTCLK TO_REG(0x33C)
124 #define AST2600_HW_STRAP1 TO_REG(0x500)
125 #define AST2600_HW_STRAP1_CLR TO_REG(0x504)
126 #define AST2600_HW_STRAP1_PROT TO_REG(0x508)
127 #define AST2600_HW_STRAP2 TO_REG(0x510)
128 #define AST2600_HW_STRAP2_CLR TO_REG(0x514)
129 #define AST2600_HW_STRAP2_PROT TO_REG(0x518)
130 #define AST2600_RNG_CTRL TO_REG(0x524)
131 #define AST2600_RNG_DATA TO_REG(0x540)
132 #define AST2600_CHIP_ID0 TO_REG(0x5B0)
133 #define AST2600_CHIP_ID1 TO_REG(0x5B4)
134
135 #define AST2600_CLK TO_REG(0x40)
136
137 #define SCU_IO_REGION_SIZE 0x1000
138
139 static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = {
140 [SYS_RST_CTRL] = 0xFFCFFEDCU,
141 [CLK_SEL] = 0xF3F40000U,
142 [CLK_STOP_CTRL] = 0x19FC3E8BU,
143 [D2PLL_PARAM] = 0x00026108U,
144 [MPLL_PARAM] = 0x00030291U,
145 [HPLL_PARAM] = 0x00000291U,
146 [MISC_CTRL1] = 0x00000010U,
147 [PCI_CTRL1] = 0x20001A03U,
148 [PCI_CTRL2] = 0x20001A03U,
149 [PCI_CTRL3] = 0x04000030U,
150 [SYS_RST_STATUS] = 0x00000001U,
151 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */
152 [MISC_CTRL2] = 0x00000023U,
153 [RNG_CTRL] = 0x0000000EU,
154 [PINMUX_CTRL2] = 0x0000F000U,
155 [PINMUX_CTRL3] = 0x01000000U,
156 [PINMUX_CTRL4] = 0x000000FFU,
157 [PINMUX_CTRL5] = 0x0000A000U,
158 [WDT_RST_CTRL] = 0x003FFFF3U,
159 [PINMUX_CTRL8] = 0xFFFF0000U,
160 [PINMUX_CTRL9] = 0x000FFFFFU,
161 [FREE_CNTR4] = 0x000000FFU,
162 [FREE_CNTR4_EXT] = 0x000000FFU,
163 [CPU2_BASE_SEG1] = 0x80000000U,
164 [CPU2_BASE_SEG4] = 0x1E600000U,
165 [CPU2_BASE_SEG5] = 0xC0000000U,
166 [UART_HPLL_CLK] = 0x00001903U,
167 [PCIE_CTRL] = 0x0000007BU,
168 [BMC_DEV_ID] = 0x00002402U
169 };
170
171 /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */
172 /* AST2500 revision A1 */
173
174 static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = {
175 [SYS_RST_CTRL] = 0xFFCFFEDCU,
176 [CLK_SEL] = 0xF3F40000U,
177 [CLK_STOP_CTRL] = 0x19FC3E8BU,
178 [D2PLL_PARAM] = 0x00026108U,
179 [MPLL_PARAM] = 0x00030291U,
180 [HPLL_PARAM] = 0x93000400U,
181 [MISC_CTRL1] = 0x00000010U,
182 [PCI_CTRL1] = 0x20001A03U,
183 [PCI_CTRL2] = 0x20001A03U,
184 [PCI_CTRL3] = 0x04000030U,
185 [SYS_RST_STATUS] = 0x00000001U,
186 [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */
187 [MISC_CTRL2] = 0x00000023U,
188 [RNG_CTRL] = 0x0000000EU,
189 [PINMUX_CTRL2] = 0x0000F000U,
190 [PINMUX_CTRL3] = 0x03000000U,
191 [PINMUX_CTRL4] = 0x00000000U,
192 [PINMUX_CTRL5] = 0x0000A000U,
193 [WDT_RST_CTRL] = 0x023FFFF3U,
194 [PINMUX_CTRL8] = 0xFFFF0000U,
195 [PINMUX_CTRL9] = 0x000FFFFFU,
196 [FREE_CNTR4] = 0x000000FFU,
197 [FREE_CNTR4_EXT] = 0x000000FFU,
198 [CPU2_BASE_SEG1] = 0x80000000U,
199 [CPU2_BASE_SEG4] = 0x1E600000U,
200 [CPU2_BASE_SEG5] = 0xC0000000U,
201 [CHIP_ID0] = 0x1234ABCDU,
202 [CHIP_ID1] = 0x88884444U,
203 [UART_HPLL_CLK] = 0x00001903U,
204 [PCIE_CTRL] = 0x0000007BU,
205 [BMC_DEV_ID] = 0x00002402U
206 };
207
208 static uint32_t aspeed_scu_get_random(void)
209 {
210 uint32_t num;
211 qemu_guest_getrandom_nofail(&num, sizeof(num));
212 return num;
213 }
214
215 uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s)
216 {
217 return ASPEED_SCU_GET_CLASS(s)->get_apb(s);
218 }
219
220 static uint32_t aspeed_2400_scu_get_apb_freq(AspeedSCUState *s)
221 {
222 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s);
223 uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]);
224
225 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1)
226 / asc->apb_divider;
227 }
228
229 static uint32_t aspeed_2600_scu_get_apb_freq(AspeedSCUState *s)
230 {
231 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s);
232 uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]);
233
234 return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL]) + 1)
235 / asc->apb_divider;
236 }
237
238 static uint32_t aspeed_1030_scu_get_apb_freq(AspeedSCUState *s)
239 {
240 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s);
241 uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]);
242
243 return hpll / (SCU_AST1030_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL4]) + 1)
244 / asc->apb_divider;
245 }
246
247 static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size)
248 {
249 AspeedSCUState *s = ASPEED_SCU(opaque);
250 int reg = TO_REG(offset);
251
252 if (reg >= ASPEED_SCU_NR_REGS) {
253 qemu_log_mask(LOG_GUEST_ERROR,
254 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
255 __func__, offset);
256 return 0;
257 }
258
259 switch (reg) {
260 case RNG_DATA:
261 /* On hardware, RNG_DATA works regardless of
262 * the state of the enable bit in RNG_CTRL
263 */
264 s->regs[RNG_DATA] = aspeed_scu_get_random();
265 break;
266 case WAKEUP_EN:
267 qemu_log_mask(LOG_GUEST_ERROR,
268 "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n",
269 __func__, offset);
270 break;
271 }
272
273 trace_aspeed_scu_read(offset, size, s->regs[reg]);
274 return s->regs[reg];
275 }
276
277 static void aspeed_ast2400_scu_write(void *opaque, hwaddr offset,
278 uint64_t data, unsigned size)
279 {
280 AspeedSCUState *s = ASPEED_SCU(opaque);
281 int reg = TO_REG(offset);
282
283 if (reg >= ASPEED_SCU_NR_REGS) {
284 qemu_log_mask(LOG_GUEST_ERROR,
285 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
286 __func__, offset);
287 return;
288 }
289
290 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 &&
291 !s->regs[PROT_KEY]) {
292 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__);
293 }
294
295 trace_aspeed_scu_write(offset, size, data);
296
297 switch (reg) {
298 case PROT_KEY:
299 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0;
300 return;
301 case SILICON_REV:
302 case FREQ_CNTR_EVAL:
303 case VGA_SCRATCH1 ... VGA_SCRATCH8:
304 case RNG_DATA:
305 case FREE_CNTR4:
306 case FREE_CNTR4_EXT:
307 qemu_log_mask(LOG_GUEST_ERROR,
308 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n",
309 __func__, offset);
310 return;
311 }
312
313 s->regs[reg] = data;
314 }
315
316 static void aspeed_ast2500_scu_write(void *opaque, hwaddr offset,
317 uint64_t data, unsigned size)
318 {
319 AspeedSCUState *s = ASPEED_SCU(opaque);
320 int reg = TO_REG(offset);
321
322 if (reg >= ASPEED_SCU_NR_REGS) {
323 qemu_log_mask(LOG_GUEST_ERROR,
324 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
325 __func__, offset);
326 return;
327 }
328
329 if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 &&
330 !s->regs[PROT_KEY]) {
331 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__);
332 return;
333 }
334
335 trace_aspeed_scu_write(offset, size, data);
336
337 switch (reg) {
338 case PROT_KEY:
339 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0;
340 return;
341 case HW_STRAP1:
342 s->regs[HW_STRAP1] |= data;
343 return;
344 case SILICON_REV:
345 s->regs[HW_STRAP1] &= ~data;
346 return;
347 case FREQ_CNTR_EVAL:
348 case VGA_SCRATCH1 ... VGA_SCRATCH8:
349 case RNG_DATA:
350 case FREE_CNTR4:
351 case FREE_CNTR4_EXT:
352 case CHIP_ID0:
353 case CHIP_ID1:
354 qemu_log_mask(LOG_GUEST_ERROR,
355 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n",
356 __func__, offset);
357 return;
358 }
359
360 s->regs[reg] = data;
361 }
362
363 static const MemoryRegionOps aspeed_ast2400_scu_ops = {
364 .read = aspeed_scu_read,
365 .write = aspeed_ast2400_scu_write,
366 .endianness = DEVICE_LITTLE_ENDIAN,
367 .valid = {
368 .min_access_size = 1,
369 .max_access_size = 4,
370 },
371 };
372
373 static const MemoryRegionOps aspeed_ast2500_scu_ops = {
374 .read = aspeed_scu_read,
375 .write = aspeed_ast2500_scu_write,
376 .endianness = DEVICE_LITTLE_ENDIAN,
377 .valid.min_access_size = 4,
378 .valid.max_access_size = 4,
379 .valid.unaligned = false,
380 };
381
382 static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s)
383 {
384 if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN ||
385 ASPEED_SCU_GET_CLASS(s)->clkin_25Mhz) {
386 return 25000000;
387 } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) {
388 return 48000000;
389 } else {
390 return 24000000;
391 }
392 }
393
394 /*
395 * Strapped frequencies for the AST2400 in MHz. They depend on the
396 * clkin frequency.
397 */
398 static const uint32_t hpll_ast2400_freqs[][4] = {
399 { 384, 360, 336, 408 }, /* 24MHz or 48MHz */
400 { 400, 375, 350, 425 }, /* 25MHz */
401 };
402
403 static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg)
404 {
405 uint8_t freq_select;
406 bool clk_25m_in;
407 uint32_t clkin = aspeed_scu_get_clkin(s);
408
409 if (hpll_reg & SCU_AST2400_H_PLL_OFF) {
410 return 0;
411 }
412
413 if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) {
414 uint32_t multiplier = 1;
415
416 if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) {
417 uint32_t n = (hpll_reg >> 5) & 0x3f;
418 uint32_t od = (hpll_reg >> 4) & 0x1;
419 uint32_t d = hpll_reg & 0xf;
420
421 multiplier = (2 - od) * ((n + 2) / (d + 1));
422 }
423
424 return clkin * multiplier;
425 }
426
427 /* HW strapping */
428 clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN);
429 freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1);
430
431 return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000;
432 }
433
434 static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg)
435 {
436 uint32_t multiplier = 1;
437 uint32_t clkin = aspeed_scu_get_clkin(s);
438
439 if (hpll_reg & SCU_H_PLL_OFF) {
440 return 0;
441 }
442
443 if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) {
444 uint32_t p = (hpll_reg >> 13) & 0x3f;
445 uint32_t m = (hpll_reg >> 5) & 0xff;
446 uint32_t n = hpll_reg & 0x1f;
447
448 multiplier = ((m + 1) / (n + 1)) / (p + 1);
449 }
450
451 return clkin * multiplier;
452 }
453
454 static uint32_t aspeed_2600_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg)
455 {
456 uint32_t multiplier = 1;
457 uint32_t clkin = aspeed_scu_get_clkin(s);
458
459 if (hpll_reg & SCU_AST2600_H_PLL_OFF) {
460 return 0;
461 }
462
463 if (!(hpll_reg & SCU_AST2600_H_PLL_BYPASS_EN)) {
464 uint32_t p = (hpll_reg >> 19) & 0xf;
465 uint32_t n = (hpll_reg >> 13) & 0x3f;
466 uint32_t m = hpll_reg & 0x1fff;
467
468 multiplier = ((m + 1) / (n + 1)) / (p + 1);
469 }
470
471 return clkin * multiplier;
472 }
473
474 static void aspeed_scu_reset(DeviceState *dev)
475 {
476 AspeedSCUState *s = ASPEED_SCU(dev);
477 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev);
478
479 memcpy(s->regs, asc->resets, asc->nr_regs * 4);
480 s->regs[SILICON_REV] = s->silicon_rev;
481 s->regs[HW_STRAP1] = s->hw_strap1;
482 s->regs[HW_STRAP2] = s->hw_strap2;
483 s->regs[PROT_KEY] = s->hw_prot_key;
484 }
485
486 static uint32_t aspeed_silicon_revs[] = {
487 AST2400_A0_SILICON_REV,
488 AST2400_A1_SILICON_REV,
489 AST2500_A0_SILICON_REV,
490 AST2500_A1_SILICON_REV,
491 AST2600_A0_SILICON_REV,
492 AST2600_A1_SILICON_REV,
493 AST2600_A2_SILICON_REV,
494 AST2600_A3_SILICON_REV,
495 AST1030_A0_SILICON_REV,
496 AST1030_A1_SILICON_REV,
497 };
498
499 bool is_supported_silicon_rev(uint32_t silicon_rev)
500 {
501 int i;
502
503 for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) {
504 if (silicon_rev == aspeed_silicon_revs[i]) {
505 return true;
506 }
507 }
508
509 return false;
510 }
511
512 static void aspeed_scu_realize(DeviceState *dev, Error **errp)
513 {
514 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
515 AspeedSCUState *s = ASPEED_SCU(dev);
516 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev);
517
518 if (!is_supported_silicon_rev(s->silicon_rev)) {
519 error_setg(errp, "Unknown silicon revision: 0x%" PRIx32,
520 s->silicon_rev);
521 return;
522 }
523
524 memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s,
525 TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE);
526
527 sysbus_init_mmio(sbd, &s->iomem);
528 }
529
530 static const VMStateDescription vmstate_aspeed_scu = {
531 .name = "aspeed.scu",
532 .version_id = 2,
533 .minimum_version_id = 2,
534 .fields = (VMStateField[]) {
535 VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS),
536 VMSTATE_END_OF_LIST()
537 }
538 };
539
540 static Property aspeed_scu_properties[] = {
541 DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0),
542 DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0),
543 DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0),
544 DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0),
545 DEFINE_PROP_END_OF_LIST(),
546 };
547
548 static void aspeed_scu_class_init(ObjectClass *klass, void *data)
549 {
550 DeviceClass *dc = DEVICE_CLASS(klass);
551 dc->realize = aspeed_scu_realize;
552 dc->reset = aspeed_scu_reset;
553 dc->desc = "ASPEED System Control Unit";
554 dc->vmsd = &vmstate_aspeed_scu;
555 device_class_set_props(dc, aspeed_scu_properties);
556 }
557
558 static const TypeInfo aspeed_scu_info = {
559 .name = TYPE_ASPEED_SCU,
560 .parent = TYPE_SYS_BUS_DEVICE,
561 .instance_size = sizeof(AspeedSCUState),
562 .class_init = aspeed_scu_class_init,
563 .class_size = sizeof(AspeedSCUClass),
564 .abstract = true,
565 };
566
567 static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data)
568 {
569 DeviceClass *dc = DEVICE_CLASS(klass);
570 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
571
572 dc->desc = "ASPEED 2400 System Control Unit";
573 asc->resets = ast2400_a0_resets;
574 asc->calc_hpll = aspeed_2400_scu_calc_hpll;
575 asc->get_apb = aspeed_2400_scu_get_apb_freq;
576 asc->apb_divider = 2;
577 asc->nr_regs = ASPEED_SCU_NR_REGS;
578 asc->clkin_25Mhz = false;
579 asc->ops = &aspeed_ast2400_scu_ops;
580 }
581
582 static const TypeInfo aspeed_2400_scu_info = {
583 .name = TYPE_ASPEED_2400_SCU,
584 .parent = TYPE_ASPEED_SCU,
585 .instance_size = sizeof(AspeedSCUState),
586 .class_init = aspeed_2400_scu_class_init,
587 };
588
589 static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data)
590 {
591 DeviceClass *dc = DEVICE_CLASS(klass);
592 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
593
594 dc->desc = "ASPEED 2500 System Control Unit";
595 asc->resets = ast2500_a1_resets;
596 asc->calc_hpll = aspeed_2500_scu_calc_hpll;
597 asc->get_apb = aspeed_2400_scu_get_apb_freq;
598 asc->apb_divider = 4;
599 asc->nr_regs = ASPEED_SCU_NR_REGS;
600 asc->clkin_25Mhz = false;
601 asc->ops = &aspeed_ast2500_scu_ops;
602 }
603
604 static const TypeInfo aspeed_2500_scu_info = {
605 .name = TYPE_ASPEED_2500_SCU,
606 .parent = TYPE_ASPEED_SCU,
607 .instance_size = sizeof(AspeedSCUState),
608 .class_init = aspeed_2500_scu_class_init,
609 };
610
611 static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset,
612 unsigned size)
613 {
614 AspeedSCUState *s = ASPEED_SCU(opaque);
615 int reg = TO_REG(offset);
616
617 if (reg >= ASPEED_AST2600_SCU_NR_REGS) {
618 qemu_log_mask(LOG_GUEST_ERROR,
619 "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
620 __func__, offset);
621 return 0;
622 }
623
624 switch (reg) {
625 case AST2600_HPLL_EXT:
626 case AST2600_EPLL_EXT:
627 case AST2600_MPLL_EXT:
628 /* PLLs are always "locked" */
629 return s->regs[reg] | BIT(31);
630 case AST2600_RNG_DATA:
631 /*
632 * On hardware, RNG_DATA works regardless of the state of the
633 * enable bit in RNG_CTRL
634 *
635 * TODO: Check this is true for ast2600
636 */
637 s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random();
638 break;
639 }
640
641 trace_aspeed_scu_read(offset, size, s->regs[reg]);
642 return s->regs[reg];
643 }
644
645 static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset,
646 uint64_t data64, unsigned size)
647 {
648 AspeedSCUState *s = ASPEED_SCU(opaque);
649 int reg = TO_REG(offset);
650 /* Truncate here so bitwise operations below behave as expected */
651 uint32_t data = data64;
652
653 if (reg >= ASPEED_AST2600_SCU_NR_REGS) {
654 qemu_log_mask(LOG_GUEST_ERROR,
655 "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
656 __func__, offset);
657 return;
658 }
659
660 if (reg > PROT_KEY && !s->regs[PROT_KEY]) {
661 qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__);
662 }
663
664 trace_aspeed_scu_write(offset, size, data);
665
666 switch (reg) {
667 case AST2600_PROT_KEY:
668 s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0;
669 return;
670 case AST2600_HW_STRAP1:
671 case AST2600_HW_STRAP2:
672 if (s->regs[reg + 2]) {
673 return;
674 }
675 /* fall through */
676 case AST2600_SYS_RST_CTRL:
677 case AST2600_SYS_RST_CTRL2:
678 case AST2600_CLK_STOP_CTRL:
679 case AST2600_CLK_STOP_CTRL2:
680 /* W1S (Write 1 to set) registers */
681 s->regs[reg] |= data;
682 return;
683 case AST2600_SYS_RST_CTRL_CLR:
684 case AST2600_SYS_RST_CTRL2_CLR:
685 case AST2600_CLK_STOP_CTRL_CLR:
686 case AST2600_CLK_STOP_CTRL2_CLR:
687 case AST2600_HW_STRAP1_CLR:
688 case AST2600_HW_STRAP2_CLR:
689 /*
690 * W1C (Write 1 to clear) registers are offset by one address from
691 * the data register
692 */
693 s->regs[reg - 1] &= ~data;
694 return;
695
696 case AST2600_RNG_DATA:
697 case AST2600_SILICON_REV:
698 case AST2600_SILICON_REV2:
699 case AST2600_CHIP_ID0:
700 case AST2600_CHIP_ID1:
701 /* Add read only registers here */
702 qemu_log_mask(LOG_GUEST_ERROR,
703 "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n",
704 __func__, offset);
705 return;
706 }
707
708 s->regs[reg] = data;
709 }
710
711 static const MemoryRegionOps aspeed_ast2600_scu_ops = {
712 .read = aspeed_ast2600_scu_read,
713 .write = aspeed_ast2600_scu_write,
714 .endianness = DEVICE_LITTLE_ENDIAN,
715 .valid.min_access_size = 4,
716 .valid.max_access_size = 4,
717 .valid.unaligned = false,
718 };
719
720 static const uint32_t ast2600_a3_resets[ASPEED_AST2600_SCU_NR_REGS] = {
721 [AST2600_SYS_RST_CTRL] = 0xF7C3FED8,
722 [AST2600_SYS_RST_CTRL2] = 0x0DFFFFFC,
723 [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A,
724 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0,
725 [AST2600_DEBUG_CTRL] = 0x00000FFF,
726 [AST2600_DEBUG_CTRL2] = 0x000000FF,
727 [AST2600_SDRAM_HANDSHAKE] = 0x00000000,
728 [AST2600_HPLL_PARAM] = 0x1000408F,
729 [AST2600_APLL_PARAM] = 0x1000405F,
730 [AST2600_MPLL_PARAM] = 0x1008405F,
731 [AST2600_EPLL_PARAM] = 0x1004077F,
732 [AST2600_DPLL_PARAM] = 0x1078405F,
733 [AST2600_CLK_SEL] = 0xF3940000,
734 [AST2600_CLK_SEL2] = 0x00700000,
735 [AST2600_CLK_SEL3] = 0x00000000,
736 [AST2600_CLK_SEL4] = 0xF3F40000,
737 [AST2600_CLK_SEL5] = 0x30000000,
738 [AST2600_UARTCLK] = 0x00014506,
739 [AST2600_HUARTCLK] = 0x000145C0,
740 [AST2600_CHIP_ID0] = 0x1234ABCD,
741 [AST2600_CHIP_ID1] = 0x88884444,
742 };
743
744 static void aspeed_ast2600_scu_reset(DeviceState *dev)
745 {
746 AspeedSCUState *s = ASPEED_SCU(dev);
747 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev);
748
749 memcpy(s->regs, asc->resets, asc->nr_regs * 4);
750
751 /*
752 * A0 reports A0 in _REV, but subsequent revisions report A1 regardless
753 * of actual revision. QEMU and Linux only support A1 onwards so this is
754 * sufficient.
755 */
756 s->regs[AST2600_SILICON_REV] = AST2600_A3_SILICON_REV;
757 s->regs[AST2600_SILICON_REV2] = s->silicon_rev;
758 s->regs[AST2600_HW_STRAP1] = s->hw_strap1;
759 s->regs[AST2600_HW_STRAP2] = s->hw_strap2;
760 s->regs[PROT_KEY] = s->hw_prot_key;
761 }
762
763 static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data)
764 {
765 DeviceClass *dc = DEVICE_CLASS(klass);
766 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
767
768 dc->desc = "ASPEED 2600 System Control Unit";
769 dc->reset = aspeed_ast2600_scu_reset;
770 asc->resets = ast2600_a3_resets;
771 asc->calc_hpll = aspeed_2600_scu_calc_hpll;
772 asc->get_apb = aspeed_2600_scu_get_apb_freq;
773 asc->apb_divider = 4;
774 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS;
775 asc->clkin_25Mhz = true;
776 asc->ops = &aspeed_ast2600_scu_ops;
777 }
778
779 static const TypeInfo aspeed_2600_scu_info = {
780 .name = TYPE_ASPEED_2600_SCU,
781 .parent = TYPE_ASPEED_SCU,
782 .instance_size = sizeof(AspeedSCUState),
783 .class_init = aspeed_2600_scu_class_init,
784 };
785
786 static const uint32_t ast1030_a1_resets[ASPEED_AST2600_SCU_NR_REGS] = {
787 [AST2600_SYS_RST_CTRL] = 0xFFC3FED8,
788 [AST2600_SYS_RST_CTRL2] = 0x09FFFFFC,
789 [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A,
790 [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0,
791 [AST2600_DEBUG_CTRL2] = 0x00000000,
792 [AST2600_HPLL_PARAM] = 0x10004077,
793 [AST2600_HPLL_EXT] = 0x00000031,
794 [AST2600_CLK_SEL4] = 0x43F90900,
795 [AST2600_CLK_SEL5] = 0x40000000,
796 [AST2600_CHIP_ID0] = 0xDEADBEEF,
797 [AST2600_CHIP_ID1] = 0x0BADCAFE,
798 };
799
800 static void aspeed_ast1030_scu_reset(DeviceState *dev)
801 {
802 AspeedSCUState *s = ASPEED_SCU(dev);
803 AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev);
804
805 memcpy(s->regs, asc->resets, asc->nr_regs * 4);
806
807 s->regs[AST2600_SILICON_REV] = AST1030_A1_SILICON_REV;
808 s->regs[AST2600_SILICON_REV2] = s->silicon_rev;
809 s->regs[AST2600_HW_STRAP1] = s->hw_strap1;
810 s->regs[AST2600_HW_STRAP2] = s->hw_strap2;
811 s->regs[PROT_KEY] = s->hw_prot_key;
812 }
813
814 static void aspeed_1030_scu_class_init(ObjectClass *klass, void *data)
815 {
816 DeviceClass *dc = DEVICE_CLASS(klass);
817 AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
818
819 dc->desc = "ASPEED 1030 System Control Unit";
820 dc->reset = aspeed_ast1030_scu_reset;
821 asc->resets = ast1030_a1_resets;
822 asc->calc_hpll = aspeed_2600_scu_calc_hpll;
823 asc->get_apb = aspeed_1030_scu_get_apb_freq;
824 asc->apb_divider = 2;
825 asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS;
826 asc->clkin_25Mhz = true;
827 asc->ops = &aspeed_ast2600_scu_ops;
828 }
829
830 static const TypeInfo aspeed_1030_scu_info = {
831 .name = TYPE_ASPEED_1030_SCU,
832 .parent = TYPE_ASPEED_SCU,
833 .instance_size = sizeof(AspeedSCUState),
834 .class_init = aspeed_1030_scu_class_init,
835 };
836
837 static void aspeed_scu_register_types(void)
838 {
839 type_register_static(&aspeed_scu_info);
840 type_register_static(&aspeed_2400_scu_info);
841 type_register_static(&aspeed_2500_scu_info);
842 type_register_static(&aspeed_2600_scu_info);
843 type_register_static(&aspeed_1030_scu_info);
844 }
845
846 type_init(aspeed_scu_register_types);
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