freebsd-nq/sys/arm/mv/mv_machdep.c

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/*-
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
*/
#include "opt_ddb.h"
#include "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define _ARM32_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/devmap.h>
#include <machine/machdep.h>
#include <arm/mv/mvreg.h> /* XXX */
#include <arm/mv/mvvar.h> /* XXX eventually this should be eliminated */
#include <arm/mv/mvwin.h>
#include <dev/fdt/fdt_common.h>
static int platform_mpp_init(void);
#if defined(SOC_MV_ARMADAXP)
void armadaxp_init_coher_fabric(void);
void armadaxp_l2_init(void);
#endif
#define MPP_PIN_MAX 68
#define MPP_PIN_CELLS 2
#define MPP_PINS_PER_REG 8
#define MPP_SEL(pin,func) (((func) & 0xf) << \
(((pin) % MPP_PINS_PER_REG) * 4))
static int
platform_mpp_init(void)
{
pcell_t pinmap[MPP_PIN_MAX * MPP_PIN_CELLS];
int mpp[MPP_PIN_MAX];
uint32_t ctrl_val, ctrl_offset;
pcell_t reg[4];
u_long start, size;
phandle_t node;
pcell_t pin_cells, *pinmap_ptr, pin_count;
ssize_t len;
int par_addr_cells, par_size_cells;
int tuple_size, tuples, rv, pins, i, j;
int mpp_pin, mpp_function;
/*
* Try to access the MPP node directly i.e. through /aliases/mpp.
*/
if ((node = OF_finddevice("mpp")) != -1)
if (fdt_is_compatible(node, "mrvl,mpp"))
goto moveon;
/*
* Find the node the long way.
*/
if ((node = OF_finddevice("/")) == -1)
return (ENXIO);
if ((node = fdt_find_compatible(node, "simple-bus", 0)) == 0)
return (ENXIO);
if ((node = fdt_find_compatible(node, "mrvl,mpp", 0)) == 0)
/*
* No MPP node. Fall back to how MPP got set by the
* first-stage loader and try to continue booting.
*/
return (0);
moveon:
/*
* Process 'reg' prop.
*/
if ((rv = fdt_addrsize_cells(OF_parent(node), &par_addr_cells,
&par_size_cells)) != 0)
return(ENXIO);
tuple_size = sizeof(pcell_t) * (par_addr_cells + par_size_cells);
len = OF_getprop(node, "reg", reg, sizeof(reg));
tuples = len / tuple_size;
if (tuple_size <= 0)
return (EINVAL);
/*
* Get address/size. XXX we assume only the first 'reg' tuple is used.
*/
rv = fdt_data_to_res(reg, par_addr_cells, par_size_cells,
&start, &size);
if (rv != 0)
return (rv);
start += fdt_immr_va;
/*
* Process 'pin-count' and 'pin-map' props.
*/
if (OF_getprop(node, "pin-count", &pin_count, sizeof(pin_count)) <= 0)
return (ENXIO);
pin_count = fdt32_to_cpu(pin_count);
if (pin_count > MPP_PIN_MAX)
return (ERANGE);
if (OF_getprop(node, "#pin-cells", &pin_cells, sizeof(pin_cells)) <= 0)
pin_cells = MPP_PIN_CELLS;
pin_cells = fdt32_to_cpu(pin_cells);
if (pin_cells > MPP_PIN_CELLS)
return (ERANGE);
tuple_size = sizeof(pcell_t) * pin_cells;
bzero(pinmap, sizeof(pinmap));
len = OF_getprop(node, "pin-map", pinmap, sizeof(pinmap));
if (len <= 0)
return (ERANGE);
if (len % tuple_size)
return (ERANGE);
pins = len / tuple_size;
if (pins > pin_count)
return (ERANGE);
/*
* Fill out a "mpp[pin] => function" table. All pins unspecified in
* the 'pin-map' property are defaulted to 0 function i.e. GPIO.
*/
bzero(mpp, sizeof(mpp));
pinmap_ptr = pinmap;
for (i = 0; i < pins; i++) {
mpp_pin = fdt32_to_cpu(*pinmap_ptr);
mpp_function = fdt32_to_cpu(*(pinmap_ptr + 1));
mpp[mpp_pin] = mpp_function;
pinmap_ptr += pin_cells;
}
/*
* Prepare and program MPP control register values.
*/
ctrl_offset = 0;
for (i = 0; i < pin_count;) {
ctrl_val = 0;
for (j = 0; j < MPP_PINS_PER_REG; j++) {
if (i + j == pin_count - 1)
break;
ctrl_val |= MPP_SEL(i + j, mpp[i + j]);
}
i += MPP_PINS_PER_REG;
bus_space_write_4(fdtbus_bs_tag, start, ctrl_offset,
ctrl_val);
#if defined(SOC_MV_ORION)
/*
* Third MPP reg on Orion SoC is placed
* non-linearly (with different offset).
*/
if (i == (2 * MPP_PINS_PER_REG))
ctrl_offset = 0x50;
else
#endif
ctrl_offset += 4;
}
return (0);
}
vm_offset_t
initarm_lastaddr(void)
{
if (fdt_immr_addr(MV_BASE) != 0)
while (1);
/* Platform-specific initialisation */
return (fdt_immr_va);
}
void
initarm_gpio_init(void)
{
/*
* Re-initialise MPP. It is important to call this prior to using
* console as the physical connection can be routed via MPP.
*/
if (platform_mpp_init() != 0)
while (1);
}
void
initarm_late_init(void)
{
/*
* Re-initialise decode windows
*/
#if !defined(SOC_MV_FREY)
if (soc_decode_win() != 0)
printf("WARNING: could not re-initialise decode windows! "
"Running with existing settings...\n");
#else
/* Disable watchdog and timers */
write_cpu_ctrl(CPU_TIMERS_BASE + CPU_TIMER_CONTROL, 0);
#endif
#if defined(SOC_MV_ARMADAXP)
#if !defined(SMP)
/* For SMP case it should be initialized after APs are booted */
armadaxp_init_coher_fabric();
#endif
armadaxp_l2_init();
#endif
}
#define FDT_DEVMAP_MAX (MV_WIN_CPU_MAX + 2)
static struct arm_devmap_entry fdt_devmap[FDT_DEVMAP_MAX] = {
{ 0, 0, 0, 0, 0, }
};
static int
platform_sram_devmap(struct arm_devmap_entry *map)
{
#if !defined(SOC_MV_ARMADAXP)
phandle_t child, root;
u_long base, size;
/*
* SRAM range.
*/
if ((child = OF_finddevice("/sram")) != 0)
if (fdt_is_compatible(child, "mrvl,cesa-sram") ||
fdt_is_compatible(child, "mrvl,scratchpad"))
goto moveon;
if ((root = OF_finddevice("/")) == 0)
return (ENXIO);
if ((child = fdt_find_compatible(root, "mrvl,cesa-sram", 0)) == 0 &&
(child = fdt_find_compatible(root, "mrvl,scratchpad", 0)) == 0)
goto out;
moveon:
if (fdt_regsize(child, &base, &size) != 0)
return (EINVAL);
map->pd_va = MV_CESA_SRAM_BASE; /* XXX */
map->pd_pa = base;
map->pd_size = size;
map->pd_prot = VM_PROT_READ | VM_PROT_WRITE;
map->pd_cache = PTE_NOCACHE;
return (0);
out:
#endif
return (ENOENT);
}
/*
* Supply a default do-nothing implementation of fdt_pci_devmap() via a weak
* alias. Many Marvell platforms don't support a PCI interface, but to support
* those that do, we end up with a reference to this function below, in
* platform_devmap_init(). If "device pci" appears in the kernel config, the
* real implementation of this function in dev/fdt/fdt_pci.c overrides the weak
* alias defined here.
*/
int mv_default_fdt_pci_devmap(phandle_t node, struct arm_devmap_entry *devmap,
vm_offset_t io_va, vm_offset_t mem_va);
int
mv_default_fdt_pci_devmap(phandle_t node, struct arm_devmap_entry *devmap,
vm_offset_t io_va, vm_offset_t mem_va)
{
return (0);
}
__weak_reference(mv_default_fdt_pci_devmap, fdt_pci_devmap);
/*
* XXX: When device entry in devmap has pd_size smaller than section size,
* system will freeze during initialization
*/
/*
* Construct pmap_devmap[] with DT-derived config data.
*/
int
platform_devmap_init(void)
{
phandle_t root, child;
pcell_t bank_count;
int i, num_mapped;
i = 0;
arm_devmap_register_table(&fdt_devmap[0]);
#ifdef SOC_MV_ARMADAXP
vm_paddr_t cur_immr_pa;
/*
* Acquire SoC registers' base passed by u-boot and fill devmap
* accordingly. DTB is going to be modified basing on this data
* later.
*/
__asm __volatile("mrc p15, 4, %0, c15, c0, 0" : "=r" (cur_immr_pa));
cur_immr_pa = (cur_immr_pa << 13) & 0xff000000;
if (cur_immr_pa != 0)
fdt_immr_pa = cur_immr_pa;
#endif
/*
* IMMR range.
*/
fdt_devmap[i].pd_va = fdt_immr_va;
fdt_devmap[i].pd_pa = fdt_immr_pa;
fdt_devmap[i].pd_size = fdt_immr_size;
fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
fdt_devmap[i].pd_cache = PTE_NOCACHE;
i++;
/*
* SRAM range.
*/
if (i < FDT_DEVMAP_MAX)
if (platform_sram_devmap(&fdt_devmap[i]) == 0)
i++;
/*
* PCI range(s).
* PCI range(s) and localbus.
*/
if ((root = OF_finddevice("/")) == -1)
return (ENXIO);
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
if (fdt_is_type(child, "pci") || fdt_is_type(child, "pciep")) {
/*
* Check space: each PCI node will consume 2 devmap
* entries.
*/
if (i + 1 >= FDT_DEVMAP_MAX)
return (ENOMEM);
/*
* XXX this should account for PCI and multiple ranges
* of a given kind.
*/
if (fdt_pci_devmap(child, &fdt_devmap[i], MV_PCI_VA_IO_BASE,
MV_PCI_VA_MEM_BASE) != 0)
return (ENXIO);
i += 2;
}
if (fdt_is_compatible(child, "mrvl,lbc")) {
/* Check available space */
if (OF_getprop(child, "bank-count", (void *)&bank_count,
sizeof(bank_count)) <= 0)
/* If no property, use default value */
bank_count = 1;
else
bank_count = fdt32_to_cpu(bank_count);
if ((i + bank_count) >= FDT_DEVMAP_MAX)
return (ENOMEM);
/* Add all localbus ranges to device map */
num_mapped = 0;
if (fdt_localbus_devmap(child, &fdt_devmap[i],
(int)bank_count, &num_mapped) != 0)
return (ENXIO);
i += num_mapped;
}
}
return (0);
}
struct arm32_dma_range *
bus_dma_get_range(void)
{
return (NULL);
}
int
bus_dma_get_range_nb(void)
{
return (0);
}
#if defined(CPU_MV_PJ4B)
#ifdef DDB
#include <ddb/ddb.h>
DB_SHOW_COMMAND(cp15, db_show_cp15)
{
u_int reg;
__asm __volatile("mrc p15, 0, %0, c0, c0, 0" : "=r" (reg));
db_printf("Cpu ID: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c0, 1" : "=r" (reg));
db_printf("Current Cache Lvl ID: 0x%08x\n",reg);
__asm __volatile("mrc p15, 0, %0, c1, c0, 0" : "=r" (reg));
db_printf("Ctrl: 0x%08x\n",reg);
__asm __volatile("mrc p15, 0, %0, c1, c0, 1" : "=r" (reg));
db_printf("Aux Ctrl: 0x%08x\n",reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 0" : "=r" (reg));
db_printf("Processor Feat 0: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 1" : "=r" (reg));
db_printf("Processor Feat 1: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 2" : "=r" (reg));
db_printf("Debug Feat 0: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 3" : "=r" (reg));
db_printf("Auxiliary Feat 0: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 4" : "=r" (reg));
db_printf("Memory Model Feat 0: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 5" : "=r" (reg));
db_printf("Memory Model Feat 1: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 6" : "=r" (reg));
db_printf("Memory Model Feat 2: 0x%08x\n", reg);
__asm __volatile("mrc p15, 0, %0, c0, c1, 7" : "=r" (reg));
db_printf("Memory Model Feat 3: 0x%08x\n", reg);
__asm __volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (reg));
db_printf("Aux Func Modes Ctrl 0: 0x%08x\n",reg);
__asm __volatile("mrc p15, 1, %0, c15, c2, 1" : "=r" (reg));
db_printf("Aux Func Modes Ctrl 1: 0x%08x\n",reg);
__asm __volatile("mrc p15, 1, %0, c15, c12, 0" : "=r" (reg));
db_printf("CPU ID code extension: 0x%08x\n",reg);
}
DB_SHOW_COMMAND(vtop, db_show_vtop)
{
u_int reg;
if (have_addr) {
__asm __volatile("mcr p15, 0, %0, c7, c8, 0" : : "r" (addr));
__asm __volatile("mrc p15, 0, %0, c7, c4, 0" : "=r" (reg));
db_printf("Physical address reg: 0x%08x\n",reg);
} else
db_printf("show vtop <virt_addr>\n");
}
#endif /* DDB */
#endif /* CPU_MV_PJ4B */