1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright 2012-2016 Freescale Semiconductor, Inc.
9 #include <linux/log2.h>
11 #include <asm/fsl_pamu.h>
17 static inline int __ilog2_roundup_64(uint64_t val)
19 if ((val & (val - 1)) == 0)
20 return __ilog2_u64(val);
22 return __ilog2_u64(val) + 1;
26 static inline int count_lsb_zeroes(unsigned long val)
31 static unsigned int map_addrspace_size_to_wse(uint64_t addrspace_size)
33 /* window size is 2^(WSE+1) bytes */
34 return count_lsb_zeroes(addrspace_size >> PAMU_PAGE_SHIFT) +
38 static unsigned int map_subwindow_cnt_to_wce(uint32_t subwindow_cnt)
40 /* window count is 2^(WCE+1) bytes */
41 return count_lsb_zeroes(subwindow_cnt) - 1;
44 static void pamu_setup_default_xfer_to_host_ppaace(struct paace *ppaace)
46 set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
47 set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
48 PAACE_M_COHERENCE_REQ);
51 static void pamu_setup_default_xfer_to_host_spaace(struct paace *spaace)
53 set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY);
54 set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
55 PAACE_M_COHERENCE_REQ);
58 /** Sets up PPAACE entry for specified liodn
60 * @param[in] liodn Logical IO device number
61 * @param[in] win_addr starting address of DSA window
62 * @param[in] win-size size of DSA window
63 * @param[in] omi Operation mapping index -- if ~omi == 0 then omi
65 * @param[in] stashid cache stash id for associated cpu -- if ~stashid == 0
66 then stashid not defined
67 * @param[in] snoopid snoop id for hardware coherency -- if ~snoopid == 0
68 then snoopid not defined
69 * @param[in] subwin_cnt number of sub-windows
71 * @return Returns 0 upon success else error code < 0 returned
73 static int pamu_config_ppaace(uint32_t liodn, uint64_t win_addr,
74 uint64_t win_size, uint32_t omi,
75 uint32_t snoopid, uint32_t stashid,
80 if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE)
83 if (win_addr & (win_size - 1))
86 if (liodn > NUM_PPAACT_ENTRIES) {
87 printf("Entries in PPACT not sufficient\n");
91 ppaace = &ppaact[liodn];
93 /* window size is 2^(WSE+1) bytes */
94 set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
95 map_addrspace_size_to_wse(win_size));
97 pamu_setup_default_xfer_to_host_ppaace(ppaace);
99 if (sizeof(phys_addr_t) > 4)
100 ppaace->wbah = (u64)win_addr >> (PAMU_PAGE_SHIFT + 20);
104 set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL,
105 (win_addr >> PAMU_PAGE_SHIFT));
107 /* set up operation mapping if it's configured */
108 if (omi < OME_NUMBER_ENTRIES) {
109 set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
110 ppaace->op_encode.index_ot.omi = omi;
111 } else if (~omi != 0) {
115 /* configure stash id */
117 set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);
119 /* configure snoop id */
121 ppaace->domain_attr.to_host.snpid = snoopid;
124 /* window count is 2^(WCE+1) bytes */
125 set_bf(ppaace->impl_attr, PAACE_IA_WCE,
126 map_subwindow_cnt_to_wce(subwin_cnt));
127 set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1);
129 fspi = fspi + DEFAULT_NUM_SUBWINDOWS - 1;
131 set_bf(ppaace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);
134 asm volatile("sync" : : : "memory");
135 /* Mark the ppace entry valid */
136 ppaace->addr_bitfields |= PAACE_V_VALID;
137 asm volatile("sync" : : : "memory");
142 static int pamu_config_spaace(uint32_t liodn,
143 uint64_t subwin_size, uint64_t subwin_addr, uint64_t size,
144 uint32_t omi, uint32_t snoopid, uint32_t stashid)
147 /* Align start addr of subwin to subwindoe size */
148 uint64_t sec_addr = subwin_addr & ~(subwin_size - 1);
149 uint64_t end_addr = subwin_addr + size;
150 int size_shift = __ilog2_u64(subwin_size);
151 uint64_t win_size = 0;
152 uint32_t index, swse;
153 unsigned long fspi_idx;
155 /* Recalculate the size */
156 size = end_addr - sec_addr;
161 if (liodn > NUM_PPAACT_ENTRIES) {
162 printf("LIODN No programmed %d > no. of PPAACT entries %d\n",
163 liodn, NUM_PPAACT_ENTRIES);
167 while (sec_addr < end_addr) {
168 debug("sec_addr < end_addr is %llx < %llx\n", sec_addr,
170 paace = &ppaact[liodn];
173 fspi_idx = paace->fspi;
175 /* Calculating the win_size here as if we map in index 0,
176 paace entry woudl need to be programmed for SWSE */
177 win_size = end_addr - sec_addr;
178 win_size = 1 << __ilog2_roundup_64(win_size);
180 if (win_size > subwin_size)
181 win_size = subwin_size;
182 else if (win_size < PAMU_PAGE_SIZE)
183 win_size = PAMU_PAGE_SIZE;
185 debug("win_size is %llx\n", win_size);
187 swse = map_addrspace_size_to_wse(win_size);
188 index = sec_addr >> size_shift;
191 set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
192 set_bf(paace->addr_bitfields, PAACE_AF_AP,
194 sec_addr += subwin_size;
198 paace = sec + fspi_idx + index - 1;
200 debug("SPAACT:Writing at location %p, index %d\n", paace,
203 pamu_setup_default_xfer_to_host_spaace(paace);
204 set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn);
205 set_bf(paace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);
207 /* configure snoop id */
209 paace->domain_attr.to_host.snpid = snoopid;
211 if (paace->addr_bitfields & PAACE_V_VALID) {
212 debug("Reached overlap condition\n");
213 debug("%d < %d\n", get_bf(paace->win_bitfields,
214 PAACE_WIN_SWSE), swse);
215 if (get_bf(paace->win_bitfields, PAACE_WIN_SWSE) < swse)
216 set_bf(paace->win_bitfields, PAACE_WIN_SWSE,
219 set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
222 paace->addr_bitfields |= PAACE_V_VALID;
223 sec_addr += subwin_size;
231 u32 base_addr = CONFIG_SYS_PAMU_ADDR;
232 struct ccsr_pamu *regs;
234 u64 ppaact_phys, ppaact_lim, ppaact_size;
235 u64 spaact_phys, spaact_lim, spaact_size;
237 ppaact_size = sizeof(struct paace) * NUM_PPAACT_ENTRIES;
238 spaact_size = sizeof(struct paace) * NUM_SPAACT_ENTRIES;
240 /* Allocate space for Primary PAACT Table */
241 #if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_PPAACT_ADDR))
242 ppaact = (void *)CONFIG_SPL_PPAACT_ADDR;
244 ppaact = memalign(PAMU_TABLE_ALIGNMENT, ppaact_size);
248 memset(ppaact, 0, ppaact_size);
250 /* Allocate space for Secondary PAACT Table */
251 #if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_SPAACT_ADDR))
252 sec = (void *)CONFIG_SPL_SPAACT_ADDR;
254 sec = memalign(PAMU_TABLE_ALIGNMENT, spaact_size);
258 memset(sec, 0, spaact_size);
260 ppaact_phys = virt_to_phys((void *)ppaact);
261 ppaact_lim = ppaact_phys + ppaact_size;
263 spaact_phys = (uint64_t)virt_to_phys((void *)sec);
264 spaact_lim = spaact_phys + spaact_size;
266 /* Configure all PAMU's */
267 for (i = 0; i < CONFIG_NUM_PAMU; i++) {
268 regs = (struct ccsr_pamu *)base_addr;
270 out_be32(®s->ppbah, ppaact_phys >> 32);
271 out_be32(®s->ppbal, (uint32_t)ppaact_phys);
273 out_be32(®s->pplah, (ppaact_lim) >> 32);
274 out_be32(®s->pplal, (uint32_t)ppaact_lim);
277 out_be32(®s->spbah, spaact_phys >> 32);
278 out_be32(®s->spbal, (uint32_t)spaact_phys);
279 out_be32(®s->splah, spaact_lim >> 32);
280 out_be32(®s->splal, (uint32_t)spaact_lim);
282 asm volatile("sync" : : : "memory");
284 base_addr += PAMU_OFFSET;
290 void pamu_enable(void)
293 u32 base_addr = CONFIG_SYS_PAMU_ADDR;
294 for (i = 0; i < CONFIG_NUM_PAMU; i++) {
295 setbits_be32((void *)base_addr + PAMU_PCR_OFFSET,
297 asm volatile("sync" : : : "memory");
298 base_addr += PAMU_OFFSET;
302 void pamu_reset(void)
305 u32 base_addr = CONFIG_SYS_PAMU_ADDR;
306 struct ccsr_pamu *regs;
308 for (i = 0; i < CONFIG_NUM_PAMU; i++) {
309 regs = (struct ccsr_pamu *)base_addr;
310 /* Clear PPAACT Base register */
311 out_be32(®s->ppbah, 0);
312 out_be32(®s->ppbal, 0);
313 out_be32(®s->pplah, 0);
314 out_be32(®s->pplal, 0);
315 out_be32(®s->spbah, 0);
316 out_be32(®s->spbal, 0);
317 out_be32(®s->splah, 0);
318 out_be32(®s->splal, 0);
320 clrbits_be32((void *)regs + PAMU_PCR_OFFSET, PAMU_PCR_PE);
321 asm volatile("sync" : : : "memory");
322 base_addr += PAMU_OFFSET;
326 void pamu_disable(void)
329 u32 base_addr = CONFIG_SYS_PAMU_ADDR;
332 for (i = 0; i < CONFIG_NUM_PAMU; i++) {
333 clrbits_be32((void *)base_addr + PAMU_PCR_OFFSET, PAMU_PCR_PE);
334 asm volatile("sync" : : : "memory");
335 base_addr += PAMU_OFFSET;
340 static uint64_t find_max(uint64_t arr[], int num)
344 for (i = 1 ; i < num; i++)
345 if (arr[max] < arr[i])
351 static uint64_t find_min(uint64_t arr[], int num)
355 for (i = 1 ; i < num; i++)
356 if (arr[min] > arr[i])
362 static uint32_t get_win_cnt(uint64_t size)
364 uint32_t win_cnt = DEFAULT_NUM_SUBWINDOWS;
366 while (win_cnt && (size/win_cnt) < PAMU_PAGE_SIZE)
372 int config_pamu(struct pamu_addr_tbl *tbl, int num_entries, uint32_t liodn)
376 uint32_t num_sec_windows = 0;
377 uint32_t num_windows = 0;
378 uint64_t min_addr, max_addr;
380 uint64_t subwin_size;
383 min_addr = find_min(tbl->start_addr, num_entries);
384 max_addr = find_max(tbl->end_addr, num_entries);
385 size = max_addr - min_addr + 1;
390 sizebit = __ilog2_roundup_64(size);
392 debug("min start_addr is %llx\n", min_addr);
393 debug("max end_addr is %llx\n", max_addr);
394 debug("size found is %llx\n", size);
396 if (size < PAMU_PAGE_SIZE)
397 size = PAMU_PAGE_SIZE;
400 min_addr = min_addr & ~(size - 1);
401 if (min_addr + size > max_addr)
407 debug("PAACT :Base addr is %llx\n", min_addr);
408 debug("PAACT : Size is %llx\n", size);
409 num_windows = get_win_cnt(size);
410 /* For a single window, no spaact entries are required
411 * sec_sub_window count = 0 */
413 num_sec_windows = num_windows;
417 ret = pamu_config_ppaace(liodn, min_addr,
418 size , -1, -1, -1, num_sec_windows);
423 debug("configured ppace\n");
425 if (num_sec_windows) {
426 subwin_size = size >> count_lsb_zeroes(num_sec_windows);
427 debug("subwin_size is %llx\n", subwin_size);
429 for (i = 0; i < num_entries; i++) {
430 ret = pamu_config_spaace(liodn,
431 subwin_size, tbl->start_addr[i] - min_addr,
432 tbl->size[i], -1, -1, -1);