u-boot/arch/powerpc/cpu/mpc8xxx/fsl_pamu.c

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/*
* FSL PAMU driver
*
* Copyright 2012-2016 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/log2.h>
#include <malloc.h>
#include <asm/fsl_pamu.h>
struct paace *ppaact;
struct paace *sec;
unsigned long fspi;
static inline int __ilog2_roundup_64(uint64_t val)
{
if ((val & (val - 1)) == 0)
return __ilog2_u64(val);
else
return __ilog2_u64(val) + 1;
}
static inline int count_lsb_zeroes(unsigned long val)
{
return ffs(val) - 1;
}
static unsigned int map_addrspace_size_to_wse(uint64_t addrspace_size)
{
/* window size is 2^(WSE+1) bytes */
return count_lsb_zeroes(addrspace_size >> PAMU_PAGE_SHIFT) +
PAMU_PAGE_SHIFT - 1;
}
static unsigned int map_subwindow_cnt_to_wce(uint32_t subwindow_cnt)
{
/* window count is 2^(WCE+1) bytes */
return count_lsb_zeroes(subwindow_cnt) - 1;
}
static void pamu_setup_default_xfer_to_host_ppaace(struct paace *ppaace)
{
set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
PAACE_M_COHERENCE_REQ);
}
static void pamu_setup_default_xfer_to_host_spaace(struct paace *spaace)
{
set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY);
set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
PAACE_M_COHERENCE_REQ);
}
/** Sets up PPAACE entry for specified liodn
*
* @param[in] liodn Logical IO device number
* @param[in] win_addr starting address of DSA window
* @param[in] win-size size of DSA window
* @param[in] omi Operation mapping index -- if ~omi == 0 then omi
not defined
* @param[in] stashid cache stash id for associated cpu -- if ~stashid == 0
then stashid not defined
* @param[in] snoopid snoop id for hardware coherency -- if ~snoopid == 0
then snoopid not defined
* @param[in] subwin_cnt number of sub-windows
*
* @return Returns 0 upon success else error code < 0 returned
*/
static int pamu_config_ppaace(uint32_t liodn, uint64_t win_addr,
uint64_t win_size, uint32_t omi,
uint32_t snoopid, uint32_t stashid,
uint32_t subwin_cnt)
{
struct paace *ppaace;
if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE)
return -1;
if (win_addr & (win_size - 1))
return -2;
if (liodn > NUM_PPAACT_ENTRIES) {
printf("Entries in PPACT not sufficient\n");
return -3;
}
ppaace = &ppaact[liodn];
/* window size is 2^(WSE+1) bytes */
set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
map_addrspace_size_to_wse(win_size));
pamu_setup_default_xfer_to_host_ppaace(ppaace);
if (sizeof(phys_addr_t) > 4)
ppaace->wbah = (u64)win_addr >> (PAMU_PAGE_SHIFT + 20);
else
ppaace->wbah = 0;
set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL,
(win_addr >> PAMU_PAGE_SHIFT));
/* set up operation mapping if it's configured */
if (omi < OME_NUMBER_ENTRIES) {
set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
ppaace->op_encode.index_ot.omi = omi;
} else if (~omi != 0) {
return -3;
}
/* configure stash id */
if (~stashid != 0)
set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);
/* configure snoop id */
if (~snoopid != 0)
ppaace->domain_attr.to_host.snpid = snoopid;
if (subwin_cnt) {
/* window count is 2^(WCE+1) bytes */
set_bf(ppaace->impl_attr, PAACE_IA_WCE,
map_subwindow_cnt_to_wce(subwin_cnt));
set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1);
ppaace->fspi = fspi;
fspi = fspi + DEFAULT_NUM_SUBWINDOWS - 1;
} else {
set_bf(ppaace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);
}
asm volatile("sync" : : : "memory");
/* Mark the ppace entry valid */
ppaace->addr_bitfields |= PAACE_V_VALID;
asm volatile("sync" : : : "memory");
return 0;
}
static int pamu_config_spaace(uint32_t liodn,
uint64_t subwin_size, uint64_t subwin_addr, uint64_t size,
uint32_t omi, uint32_t snoopid, uint32_t stashid)
{
struct paace *paace;
/* Align start addr of subwin to subwindoe size */
uint64_t sec_addr = subwin_addr & ~(subwin_size - 1);
uint64_t end_addr = subwin_addr + size;
int size_shift = __ilog2_u64(subwin_size);
uint64_t win_size = 0;
uint32_t index, swse;
unsigned long fspi_idx;
/* Recalculate the size */
size = end_addr - sec_addr;
if (!subwin_size)
return -1;
if (liodn > NUM_PPAACT_ENTRIES) {
printf("LIODN No programmed %d > no. of PPAACT entries %d\n",
liodn, NUM_PPAACT_ENTRIES);
return -1;
}
while (sec_addr < end_addr) {
debug("sec_addr < end_addr is %llx < %llx\n", sec_addr,
end_addr);
paace = &ppaact[liodn];
if (!paace)
return -1;
fspi_idx = paace->fspi;
/* Calculating the win_size here as if we map in index 0,
paace entry woudl need to be programmed for SWSE */
win_size = end_addr - sec_addr;
win_size = 1 << __ilog2_roundup_64(win_size);
if (win_size > subwin_size)
win_size = subwin_size;
else if (win_size < PAMU_PAGE_SIZE)
win_size = PAMU_PAGE_SIZE;
debug("win_size is %llx\n", win_size);
swse = map_addrspace_size_to_wse(win_size);
index = sec_addr >> size_shift;
if (index == 0) {
set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
set_bf(paace->addr_bitfields, PAACE_AF_AP,
PAACE_AP_PERMS_ALL);
sec_addr += subwin_size;
continue;
}
paace = sec + fspi_idx + index - 1;
debug("SPAACT:Writing at location %p, index %d\n", paace,
index);
pamu_setup_default_xfer_to_host_spaace(paace);
set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn);
set_bf(paace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);
/* configure snoop id */
if (~snoopid != 0)
paace->domain_attr.to_host.snpid = snoopid;
if (paace->addr_bitfields & PAACE_V_VALID) {
debug("Reached overlap condition\n");
debug("%d < %d\n", get_bf(paace->win_bitfields,
PAACE_WIN_SWSE), swse);
if (get_bf(paace->win_bitfields, PAACE_WIN_SWSE) < swse)
set_bf(paace->win_bitfields, PAACE_WIN_SWSE,
swse);
} else {
set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
}
paace->addr_bitfields |= PAACE_V_VALID;
sec_addr += subwin_size;
}
return 0;
}
int pamu_init(void)
{
u32 base_addr = CONFIG_SYS_PAMU_ADDR;
struct ccsr_pamu *regs;
u32 i = 0;
u64 ppaact_phys, ppaact_lim, ppaact_size;
u64 spaact_phys, spaact_lim, spaact_size;
ppaact_size = sizeof(struct paace) * NUM_PPAACT_ENTRIES;
spaact_size = sizeof(struct paace) * NUM_SPAACT_ENTRIES;
/* Allocate space for Primary PAACT Table */
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_PPAACT_ADDR))
ppaact = (void *)CONFIG_SPL_PPAACT_ADDR;
#else
ppaact = memalign(PAMU_TABLE_ALIGNMENT, ppaact_size);
if (!ppaact)
return -1;
#endif
memset(ppaact, 0, ppaact_size);
/* Allocate space for Secondary PAACT Table */
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_SPAACT_ADDR))
sec = (void *)CONFIG_SPL_SPAACT_ADDR;
#else
sec = memalign(PAMU_TABLE_ALIGNMENT, spaact_size);
if (!sec)
return -1;
#endif
memset(sec, 0, spaact_size);
ppaact_phys = virt_to_phys((void *)ppaact);
ppaact_lim = ppaact_phys + ppaact_size;
spaact_phys = (uint64_t)virt_to_phys((void *)sec);
spaact_lim = spaact_phys + spaact_size;
/* Configure all PAMU's */
for (i = 0; i < CONFIG_NUM_PAMU; i++) {
regs = (struct ccsr_pamu *)base_addr;
out_be32(&regs->ppbah, ppaact_phys >> 32);
out_be32(&regs->ppbal, (uint32_t)ppaact_phys);
out_be32(&regs->pplah, (ppaact_lim) >> 32);
out_be32(&regs->pplal, (uint32_t)ppaact_lim);
if (sec != NULL) {
out_be32(&regs->spbah, spaact_phys >> 32);
out_be32(&regs->spbal, (uint32_t)spaact_phys);
out_be32(&regs->splah, spaact_lim >> 32);
out_be32(&regs->splal, (uint32_t)spaact_lim);
}
asm volatile("sync" : : : "memory");
base_addr += PAMU_OFFSET;
}
return 0;
}
void pamu_enable(void)
{
u32 i = 0;
u32 base_addr = CONFIG_SYS_PAMU_ADDR;
for (i = 0; i < CONFIG_NUM_PAMU; i++) {
setbits_be32((void *)base_addr + PAMU_PCR_OFFSET,
PAMU_PCR_PE);
asm volatile("sync" : : : "memory");
base_addr += PAMU_OFFSET;
}
}
void pamu_reset(void)
{
u32 i = 0;
u32 base_addr = CONFIG_SYS_PAMU_ADDR;
struct ccsr_pamu *regs;
for (i = 0; i < CONFIG_NUM_PAMU; i++) {
regs = (struct ccsr_pamu *)base_addr;
/* Clear PPAACT Base register */
out_be32(&regs->ppbah, 0);
out_be32(&regs->ppbal, 0);
out_be32(&regs->pplah, 0);
out_be32(&regs->pplal, 0);
out_be32(&regs->spbah, 0);
out_be32(&regs->spbal, 0);
out_be32(&regs->splah, 0);
out_be32(&regs->splal, 0);
clrbits_be32((void *)regs + PAMU_PCR_OFFSET, PAMU_PCR_PE);
asm volatile("sync" : : : "memory");
base_addr += PAMU_OFFSET;
}
}
void pamu_disable(void)
{
u32 i = 0;
u32 base_addr = CONFIG_SYS_PAMU_ADDR;
for (i = 0; i < CONFIG_NUM_PAMU; i++) {
clrbits_be32((void *)base_addr + PAMU_PCR_OFFSET, PAMU_PCR_PE);
asm volatile("sync" : : : "memory");
base_addr += PAMU_OFFSET;
}
}
static uint64_t find_max(uint64_t arr[], int num)
{
int i = 0;
int max = 0;
for (i = 1 ; i < num; i++)
if (arr[max] < arr[i])
max = i;
return arr[max];
}
static uint64_t find_min(uint64_t arr[], int num)
{
int i = 0;
int min = 0;
for (i = 1 ; i < num; i++)
if (arr[min] > arr[i])
min = i;
return arr[min];
}
static uint32_t get_win_cnt(uint64_t size)
{
uint32_t win_cnt = DEFAULT_NUM_SUBWINDOWS;
while (win_cnt && (size/win_cnt) < PAMU_PAGE_SIZE)
win_cnt >>= 1;
return win_cnt;
}
int config_pamu(struct pamu_addr_tbl *tbl, int num_entries, uint32_t liodn)
{
int i = 0;
int ret = 0;
uint32_t num_sec_windows = 0;
uint32_t num_windows = 0;
uint64_t min_addr, max_addr;
uint64_t size;
uint64_t subwin_size;
int sizebit;
min_addr = find_min(tbl->start_addr, num_entries);
max_addr = find_max(tbl->end_addr, num_entries);
size = max_addr - min_addr + 1;
if (!size)
return -1;
sizebit = __ilog2_roundup_64(size);
size = 1 << sizebit;
debug("min start_addr is %llx\n", min_addr);
debug("max end_addr is %llx\n", max_addr);
debug("size found is %llx\n", size);
if (size < PAMU_PAGE_SIZE)
size = PAMU_PAGE_SIZE;
while (1) {
min_addr = min_addr & ~(size - 1);
if (min_addr + size > max_addr)
break;
size <<= 1;
if (!size)
return -1;
}
debug("PAACT :Base addr is %llx\n", min_addr);
debug("PAACT : Size is %llx\n", size);
num_windows = get_win_cnt(size);
/* For a single window, no spaact entries are required
* sec_sub_window count = 0 */
if (num_windows > 1)
num_sec_windows = num_windows;
else
num_sec_windows = 0;
ret = pamu_config_ppaace(liodn, min_addr,
size , -1, -1, -1, num_sec_windows);
if (ret < 0)
return ret;
debug("configured ppace\n");
if (num_sec_windows) {
subwin_size = size >> count_lsb_zeroes(num_sec_windows);
debug("subwin_size is %llx\n", subwin_size);
for (i = 0; i < num_entries; i++) {
ret = pamu_config_spaace(liodn,
subwin_size, tbl->start_addr[i] - min_addr,
tbl->size[i], -1, -1, -1);
if (ret < 0)
return ret;
}
}
return ret;
}