2 * QEMU PowerPC 4xx embedded processors shared devices emulation
4 * Copyright (c) 2007 Jocelyn Mayer
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 #include "exec/address-spaces.h"
31 //#define DEBUG_UNASSIGNED
36 # define LOG_UIC(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
38 # define LOG_UIC(...) do { } while (0)
41 static void ppc4xx_reset(void *opaque)
43 PowerPCCPU *cpu = opaque;
48 /*****************************************************************************/
49 /* Generic PowerPC 4xx processor instantiation */
50 CPUPPCState *ppc4xx_init (const char *cpu_model,
51 clk_setup_t *cpu_clk, clk_setup_t *tb_clk,
58 cpu = cpu_ppc_init(cpu_model);
60 fprintf(stderr, "Unable to find PowerPC %s CPU definition\n",
66 cpu_clk->cb = NULL; /* We don't care about CPU clock frequency changes */
67 cpu_clk->opaque = env;
68 /* Set time-base frequency to sysclk */
69 tb_clk->cb = ppc_40x_timers_init(env, sysclk, PPC_INTERRUPT_PIT);
71 ppc_dcr_init(env, NULL, NULL);
72 /* Register qemu callbacks */
73 qemu_register_reset(ppc4xx_reset, cpu);
78 /*****************************************************************************/
79 /* "Universal" Interrupt controller */
93 #define UIC_MAX_IRQ 32
94 typedef struct ppcuic_t ppcuic_t;
98 uint32_t level; /* Remembers the state of level-triggered interrupts. */
99 uint32_t uicsr; /* Status register */
100 uint32_t uicer; /* Enable register */
101 uint32_t uiccr; /* Critical register */
102 uint32_t uicpr; /* Polarity register */
103 uint32_t uictr; /* Triggering register */
104 uint32_t uicvcr; /* Vector configuration register */
109 static void ppcuic_trigger_irq (ppcuic_t *uic)
112 int start, end, inc, i;
114 /* Trigger interrupt if any is pending */
115 ir = uic->uicsr & uic->uicer & (~uic->uiccr);
116 cr = uic->uicsr & uic->uicer & uic->uiccr;
117 LOG_UIC("%s: uicsr %08" PRIx32 " uicer %08" PRIx32
118 " uiccr %08" PRIx32 "\n"
119 " %08" PRIx32 " ir %08" PRIx32 " cr %08" PRIx32 "\n",
120 __func__, uic->uicsr, uic->uicer, uic->uiccr,
121 uic->uicsr & uic->uicer, ir, cr);
122 if (ir != 0x0000000) {
123 LOG_UIC("Raise UIC interrupt\n");
124 qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_INT]);
126 LOG_UIC("Lower UIC interrupt\n");
127 qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_INT]);
129 /* Trigger critical interrupt if any is pending and update vector */
130 if (cr != 0x0000000) {
131 qemu_irq_raise(uic->irqs[PPCUIC_OUTPUT_CINT]);
132 if (uic->use_vectors) {
133 /* Compute critical IRQ vector */
134 if (uic->uicvcr & 1) {
143 uic->uicvr = uic->uicvcr & 0xFFFFFFFC;
144 for (i = start; i <= end; i += inc) {
146 uic->uicvr += (i - start) * 512 * inc;
151 LOG_UIC("Raise UIC critical interrupt - "
152 "vector %08" PRIx32 "\n", uic->uicvr);
154 LOG_UIC("Lower UIC critical interrupt\n");
155 qemu_irq_lower(uic->irqs[PPCUIC_OUTPUT_CINT]);
156 uic->uicvr = 0x00000000;
160 static void ppcuic_set_irq (void *opaque, int irq_num, int level)
166 mask = 1 << (31-irq_num);
167 LOG_UIC("%s: irq %d level %d uicsr %08" PRIx32
168 " mask %08" PRIx32 " => %08" PRIx32 " %08" PRIx32 "\n",
169 __func__, irq_num, level,
170 uic->uicsr, mask, uic->uicsr & mask, level << irq_num);
171 if (irq_num < 0 || irq_num > 31)
175 /* Update status register */
176 if (uic->uictr & mask) {
177 /* Edge sensitive interrupt */
181 /* Level sensitive interrupt */
190 LOG_UIC("%s: irq %d level %d sr %" PRIx32 " => "
191 "%08" PRIx32 "\n", __func__, irq_num, level, uic->uicsr, sr);
192 if (sr != uic->uicsr)
193 ppcuic_trigger_irq(uic);
196 static uint32_t dcr_read_uic (void *opaque, int dcrn)
202 dcrn -= uic->dcr_base;
221 ret = uic->uicsr & uic->uicer;
224 if (!uic->use_vectors)
229 if (!uic->use_vectors)
242 static void dcr_write_uic (void *opaque, int dcrn, uint32_t val)
247 dcrn -= uic->dcr_base;
248 LOG_UIC("%s: dcr %d val 0x%x\n", __func__, dcrn, val);
252 uic->uicsr |= uic->level;
253 ppcuic_trigger_irq(uic);
257 ppcuic_trigger_irq(uic);
261 ppcuic_trigger_irq(uic);
265 ppcuic_trigger_irq(uic);
272 ppcuic_trigger_irq(uic);
279 uic->uicvcr = val & 0xFFFFFFFD;
280 ppcuic_trigger_irq(uic);
285 static void ppcuic_reset (void *opaque)
290 uic->uiccr = 0x00000000;
291 uic->uicer = 0x00000000;
292 uic->uicpr = 0x00000000;
293 uic->uicsr = 0x00000000;
294 uic->uictr = 0x00000000;
295 if (uic->use_vectors) {
296 uic->uicvcr = 0x00000000;
297 uic->uicvr = 0x0000000;
301 qemu_irq *ppcuic_init (CPUPPCState *env, qemu_irq *irqs,
302 uint32_t dcr_base, int has_ssr, int has_vr)
307 uic = g_malloc0(sizeof(ppcuic_t));
308 uic->dcr_base = dcr_base;
311 uic->use_vectors = 1;
312 for (i = 0; i < DCR_UICMAX; i++) {
313 ppc_dcr_register(env, dcr_base + i, uic,
314 &dcr_read_uic, &dcr_write_uic);
316 qemu_register_reset(ppcuic_reset, uic);
318 return qemu_allocate_irqs(&ppcuic_set_irq, uic, UIC_MAX_IRQ);
321 /*****************************************************************************/
322 /* SDRAM controller */
323 typedef struct ppc4xx_sdram_t ppc4xx_sdram_t;
324 struct ppc4xx_sdram_t {
327 MemoryRegion containers[4]; /* used for clipping */
328 MemoryRegion *ram_memories;
346 SDRAM0_CFGADDR = 0x010,
347 SDRAM0_CFGDATA = 0x011,
350 /* XXX: TOFIX: some patches have made this code become inconsistent:
351 * there are type inconsistencies, mixing hwaddr, target_ulong
354 static uint32_t sdram_bcr (hwaddr ram_base,
360 case (4 * 1024 * 1024):
363 case (8 * 1024 * 1024):
366 case (16 * 1024 * 1024):
369 case (32 * 1024 * 1024):
372 case (64 * 1024 * 1024):
375 case (128 * 1024 * 1024):
378 case (256 * 1024 * 1024):
382 printf("%s: invalid RAM size " TARGET_FMT_plx "\n", __func__,
386 bcr |= ram_base & 0xFF800000;
392 static inline hwaddr sdram_base(uint32_t bcr)
394 return bcr & 0xFF800000;
397 static target_ulong sdram_size (uint32_t bcr)
402 sh = (bcr >> 17) & 0x7;
406 size = (4 * 1024 * 1024) << sh;
411 static void sdram_set_bcr(ppc4xx_sdram_t *sdram,
412 uint32_t *bcrp, uint32_t bcr, int enabled)
414 unsigned n = bcrp - sdram->bcr;
416 if (*bcrp & 0x00000001) {
419 printf("%s: unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
420 __func__, sdram_base(*bcrp), sdram_size(*bcrp));
422 memory_region_del_subregion(get_system_memory(),
423 &sdram->containers[n]);
424 memory_region_del_subregion(&sdram->containers[n],
425 &sdram->ram_memories[n]);
426 memory_region_destroy(&sdram->containers[n]);
428 *bcrp = bcr & 0xFFDEE001;
429 if (enabled && (bcr & 0x00000001)) {
431 printf("%s: Map RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
432 __func__, sdram_base(bcr), sdram_size(bcr));
434 memory_region_init(&sdram->containers[n], "sdram-containers",
436 memory_region_add_subregion(&sdram->containers[n], 0,
437 &sdram->ram_memories[n]);
438 memory_region_add_subregion(get_system_memory(),
440 &sdram->containers[n]);
444 static void sdram_map_bcr (ppc4xx_sdram_t *sdram)
448 for (i = 0; i < sdram->nbanks; i++) {
449 if (sdram->ram_sizes[i] != 0) {
452 sdram_bcr(sdram->ram_bases[i], sdram->ram_sizes[i]),
455 sdram_set_bcr(sdram, &sdram->bcr[i], 0x00000000, 0);
460 static void sdram_unmap_bcr (ppc4xx_sdram_t *sdram)
464 for (i = 0; i < sdram->nbanks; i++) {
466 printf("%s: Unmap RAM area " TARGET_FMT_plx " " TARGET_FMT_lx "\n",
467 __func__, sdram_base(sdram->bcr[i]), sdram_size(sdram->bcr[i]));
469 memory_region_del_subregion(get_system_memory(),
470 &sdram->ram_memories[i]);
474 static uint32_t dcr_read_sdram (void *opaque, int dcrn)
476 ppc4xx_sdram_t *sdram;
485 switch (sdram->addr) {
486 case 0x00: /* SDRAM_BESR0 */
489 case 0x08: /* SDRAM_BESR1 */
492 case 0x10: /* SDRAM_BEAR */
495 case 0x20: /* SDRAM_CFG */
498 case 0x24: /* SDRAM_STATUS */
501 case 0x30: /* SDRAM_RTR */
504 case 0x34: /* SDRAM_PMIT */
507 case 0x40: /* SDRAM_B0CR */
510 case 0x44: /* SDRAM_B1CR */
513 case 0x48: /* SDRAM_B2CR */
516 case 0x4C: /* SDRAM_B3CR */
519 case 0x80: /* SDRAM_TR */
522 case 0x94: /* SDRAM_ECCCFG */
525 case 0x98: /* SDRAM_ECCESR */
534 /* Avoid gcc warning */
542 static void dcr_write_sdram (void *opaque, int dcrn, uint32_t val)
544 ppc4xx_sdram_t *sdram;
552 switch (sdram->addr) {
553 case 0x00: /* SDRAM_BESR0 */
554 sdram->besr0 &= ~val;
556 case 0x08: /* SDRAM_BESR1 */
557 sdram->besr1 &= ~val;
559 case 0x10: /* SDRAM_BEAR */
562 case 0x20: /* SDRAM_CFG */
564 if (!(sdram->cfg & 0x80000000) && (val & 0x80000000)) {
566 printf("%s: enable SDRAM controller\n", __func__);
568 /* validate all RAM mappings */
569 sdram_map_bcr(sdram);
570 sdram->status &= ~0x80000000;
571 } else if ((sdram->cfg & 0x80000000) && !(val & 0x80000000)) {
573 printf("%s: disable SDRAM controller\n", __func__);
575 /* invalidate all RAM mappings */
576 sdram_unmap_bcr(sdram);
577 sdram->status |= 0x80000000;
579 if (!(sdram->cfg & 0x40000000) && (val & 0x40000000))
580 sdram->status |= 0x40000000;
581 else if ((sdram->cfg & 0x40000000) && !(val & 0x40000000))
582 sdram->status &= ~0x40000000;
585 case 0x24: /* SDRAM_STATUS */
586 /* Read-only register */
588 case 0x30: /* SDRAM_RTR */
589 sdram->rtr = val & 0x3FF80000;
591 case 0x34: /* SDRAM_PMIT */
592 sdram->pmit = (val & 0xF8000000) | 0x07C00000;
594 case 0x40: /* SDRAM_B0CR */
595 sdram_set_bcr(sdram, &sdram->bcr[0], val, sdram->cfg & 0x80000000);
597 case 0x44: /* SDRAM_B1CR */
598 sdram_set_bcr(sdram, &sdram->bcr[1], val, sdram->cfg & 0x80000000);
600 case 0x48: /* SDRAM_B2CR */
601 sdram_set_bcr(sdram, &sdram->bcr[2], val, sdram->cfg & 0x80000000);
603 case 0x4C: /* SDRAM_B3CR */
604 sdram_set_bcr(sdram, &sdram->bcr[3], val, sdram->cfg & 0x80000000);
606 case 0x80: /* SDRAM_TR */
607 sdram->tr = val & 0x018FC01F;
609 case 0x94: /* SDRAM_ECCCFG */
610 sdram->ecccfg = val & 0x00F00000;
612 case 0x98: /* SDRAM_ECCESR */
614 if (sdram->eccesr == 0 && val != 0)
615 qemu_irq_raise(sdram->irq);
616 else if (sdram->eccesr != 0 && val == 0)
617 qemu_irq_lower(sdram->irq);
627 static void sdram_reset (void *opaque)
629 ppc4xx_sdram_t *sdram;
632 sdram->addr = 0x00000000;
633 sdram->bear = 0x00000000;
634 sdram->besr0 = 0x00000000; /* No error */
635 sdram->besr1 = 0x00000000; /* No error */
636 sdram->cfg = 0x00000000;
637 sdram->ecccfg = 0x00000000; /* No ECC */
638 sdram->eccesr = 0x00000000; /* No error */
639 sdram->pmit = 0x07C00000;
640 sdram->rtr = 0x05F00000;
641 sdram->tr = 0x00854009;
642 /* We pre-initialize RAM banks */
643 sdram->status = 0x00000000;
644 sdram->cfg = 0x00800000;
647 void ppc4xx_sdram_init (CPUPPCState *env, qemu_irq irq, int nbanks,
648 MemoryRegion *ram_memories,
653 ppc4xx_sdram_t *sdram;
655 sdram = g_malloc0(sizeof(ppc4xx_sdram_t));
657 sdram->nbanks = nbanks;
658 sdram->ram_memories = ram_memories;
659 memset(sdram->ram_bases, 0, 4 * sizeof(hwaddr));
660 memcpy(sdram->ram_bases, ram_bases,
661 nbanks * sizeof(hwaddr));
662 memset(sdram->ram_sizes, 0, 4 * sizeof(hwaddr));
663 memcpy(sdram->ram_sizes, ram_sizes,
664 nbanks * sizeof(hwaddr));
665 qemu_register_reset(&sdram_reset, sdram);
666 ppc_dcr_register(env, SDRAM0_CFGADDR,
667 sdram, &dcr_read_sdram, &dcr_write_sdram);
668 ppc_dcr_register(env, SDRAM0_CFGDATA,
669 sdram, &dcr_read_sdram, &dcr_write_sdram);
671 sdram_map_bcr(sdram);
674 /* Fill in consecutive SDRAM banks with 'ram_size' bytes of memory.
676 * sdram_bank_sizes[] must be 0-terminated.
678 * The 4xx SDRAM controller supports a small number of banks, and each bank
679 * must be one of a small set of sizes. The number of banks and the supported
680 * sizes varies by SoC. */
681 ram_addr_t ppc4xx_sdram_adjust(ram_addr_t ram_size, int nr_banks,
682 MemoryRegion ram_memories[],
685 const unsigned int sdram_bank_sizes[])
687 ram_addr_t size_left = ram_size;
692 for (i = 0; i < nr_banks; i++) {
693 for (j = 0; sdram_bank_sizes[j] != 0; j++) {
694 unsigned int bank_size = sdram_bank_sizes[j];
696 if (bank_size <= size_left) {
698 snprintf(name, sizeof(name), "ppc4xx.sdram%d", i);
699 memory_region_init_ram(&ram_memories[i], name, bank_size);
700 vmstate_register_ram_global(&ram_memories[i]);
702 ram_sizes[i] = bank_size;
704 size_left -= bank_size;
710 /* No need to use the remaining banks. */
715 ram_size -= size_left;
717 printf("Truncating memory to %d MiB to fit SDRAM controller limits.\n",
718 (int)(ram_size >> 20));