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setup.c
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/* setup.c: FRV specific setup
*
* Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
* Written by David Howells ([email protected])
* - Derived from arch/m68k/kernel/setup.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <generated/utsrelease.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/console.h>
#include <linux/genhd.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/major.h>
#include <linux/bootmem.h>
#include <linux/highmem.h>
#include <linux/seq_file.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>
#include <linux/serial_8250.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/sections.h>
#include <asm/pgalloc.h>
#include <asm/busctl-regs.h>
#include <asm/serial-regs.h>
#include <asm/timer-regs.h>
#include <asm/irc-regs.h>
#include <asm/spr-regs.h>
#include <asm/mb-regs.h>
#include <asm/mb93493-regs.h>
#include <asm/gdb-stub.h>
#include <asm/io.h>
#ifdef CONFIG_BLK_DEV_INITRD
#include <asm/pgtable.h>
#endif
#include "local.h"
#ifdef CONFIG_MB93090_MB00
static void __init mb93090_display(void);
#endif
#ifdef CONFIG_MMU
static void __init setup_linux_memory(void);
#else
static void __init setup_uclinux_memory(void);
#endif
#ifdef CONFIG_MB93090_MB00
static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
static char __initdata mb93090_version[] = UTS_RELEASE;
int __nongprelbss mb93090_mb00_detected;
#endif
const char __frv_unknown_system[] = "unknown";
const char __frv_mb93091_cb10[] = "mb93091-cb10";
const char __frv_mb93091_cb11[] = "mb93091-cb11";
const char __frv_mb93091_cb30[] = "mb93091-cb30";
const char __frv_mb93091_cb41[] = "mb93091-cb41";
const char __frv_mb93091_cb60[] = "mb93091-cb60";
const char __frv_mb93091_cb70[] = "mb93091-cb70";
const char __frv_mb93091_cb451[] = "mb93091-cb451";
const char __frv_mb93090_mb00[] = "mb93090-mb00";
const char __frv_mb93493[] = "mb93493";
const char __frv_mb93093[] = "mb93093";
static const char *__nongprelbss cpu_series;
static const char *__nongprelbss cpu_core;
static const char *__nongprelbss cpu_silicon;
static const char *__nongprelbss cpu_mmu;
static const char *__nongprelbss cpu_system;
static const char *__nongprelbss cpu_board1;
static const char *__nongprelbss cpu_board2;
static unsigned long __nongprelbss cpu_psr_all;
static unsigned long __nongprelbss cpu_hsr0_all;
unsigned long __nongprelbss pdm_suspend_mode;
unsigned long __nongprelbss rom_length;
unsigned long __nongprelbss memory_start;
unsigned long __nongprelbss memory_end;
unsigned long __nongprelbss dma_coherent_mem_start;
unsigned long __nongprelbss dma_coherent_mem_end;
unsigned long __initdata __sdram_old_base;
unsigned long __initdata num_mappedpages;
struct cpuinfo_frv __nongprelbss boot_cpu_data;
char __initdata command_line[COMMAND_LINE_SIZE];
char __initdata redboot_command_line[COMMAND_LINE_SIZE];
#ifdef CONFIG_PM
#define __pminit
#define __pminitdata
#else
#define __pminit __init
#define __pminitdata __initdata
#endif
struct clock_cmode {
uint8_t xbus, sdram, corebus, core, dsu;
};
#define _frac(N,D) ((N)<<4 | (D))
#define _x0_16 _frac(1,6)
#define _x0_25 _frac(1,4)
#define _x0_33 _frac(1,3)
#define _x0_375 _frac(3,8)
#define _x0_5 _frac(1,2)
#define _x0_66 _frac(2,3)
#define _x0_75 _frac(3,4)
#define _x1 _frac(1,1)
#define _x1_5 _frac(3,2)
#define _x2 _frac(2,1)
#define _x3 _frac(3,1)
#define _x4 _frac(4,1)
#define _x4_5 _frac(9,2)
#define _x6 _frac(6,1)
#define _x8 _frac(8,1)
#define _x9 _frac(9,1)
int __nongprelbss clock_p0_current;
int __nongprelbss clock_cm_current;
int __nongprelbss clock_cmode_current;
#ifdef CONFIG_PM
int __nongprelbss clock_cmodes_permitted;
unsigned long __nongprelbss clock_bits_settable;
#endif
static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
[4] = { _x1, _x1, _x2, _x2, _x0_25 },
[5] = { _x1, _x2, _x4, _x4, _x0_5 },
[8] = { _x1, _x1, _x1, _x2, _x0_25 },
[9] = { _x1, _x2, _x2, _x4, _x0_5 },
[11] = { _x1, _x4, _x4, _x8, _x1 },
[12] = { _x1, _x1, _x2, _x4, _x0_5 },
[13] = { _x1, _x2, _x4, _x8, _x1 },
};
static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
[0] = { _x1, _x1, _x1, _x1, _x0_5 },
[1] = { _x1, _x1, _x1, _x3, _x0_25 },
[2] = { _x1, _x1, _x2, _x6, _x0_5 },
[3] = { _x1, _x2, _x2, _x6, _x0_5 },
[4] = { _x1, _x1, _x2, _x2, _x0_16 },
[8] = { _x1, _x1, _x1, _x2, _x0_16 },
[9] = { _x1, _x2, _x2, _x4, _x0_33 },
[12] = { _x1, _x1, _x2, _x4, _x0_33 },
[14] = { _x1, _x3, _x3, _x9, _x0_75 },
[15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
#define CLOCK_CMODES_PERMITTED_FR405 0xd31f
};
static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
[0] = { _x1, _x2, _x2, _x4, _x0_33 },
[1] = { _x1, _x3, _x3, _x6, _x0_5 },
[2] = { _x1, _x2, _x4, _x8, _x0_66 },
[3] = { _x1, _x1_5, _x3, _x6, _x0_5 },
[4] = { _x1, _x3, _x3, _x9, _x0_75 },
[5] = { _x1, _x2, _x2, _x6, _x0_5 },
[6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
};
static const struct clock_cmode __pminitdata *clock_cmodes;
static int __pminitdata clock_doubled;
static struct uart_port __pminitdata __frv_uart0 = {
.uartclk = 0,
.membase = (char *) UART0_BASE,
.irq = IRQ_CPU_UART0,
.regshift = 3,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
};
static struct uart_port __pminitdata __frv_uart1 = {
.uartclk = 0,
.membase = (char *) UART1_BASE,
.irq = IRQ_CPU_UART1,
.regshift = 3,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
};
#if 0
static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
{
unsigned long phys, virt, cxn, size;
#ifdef CONFIG_MMU
virt = amlr & 0xffffc000;
cxn = amlr & 0x3fff;
#else
virt = ampr & 0xffffc000;
cxn = 0;
#endif
phys = ampr & xAMPRx_PPFN;
size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
i_d, n,
virt, virt + size - 1,
phys,
ampr & xAMPRx_S ? 'S' : '-',
ampr & xAMPRx_C ? 'C' : '-',
ampr & DAMPRx_WP ? 'W' : '-',
ampr & xAMPRx_V ? 'V' : '-',
cxn
);
}
#endif
/*****************************************************************************/
/*
* dump the memory map
*/
static void __init dump_memory_map(void)
{
#if 0
/* dump the protection map */
printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0);
printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1);
printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2);
printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3);
printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4);
printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5);
printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6);
printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7);
printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8);
printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9);
printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0);
printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1);
printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2);
printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3);
printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4);
printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5);
printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6);
printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7);
printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8);
printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9);
printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
#endif
#if 0
/* dump the bus controller registers */
printk("LGCR: %08lx\n", __get_LGCR());
printk("Master: %08lx-%08lx CR=%08lx\n",
__get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
__get_LMAICR());
int loop;
for (loop = 1; loop <= 7; loop++) {
unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
loop,
lsbr, lsbr + __get_LSAM(loop),
lcr & 0x80000000 ? 'r' : '-',
lcr & 0x40000000 ? 'w' : '-',
lcr & 0x08000000 ? 'b' : '-',
lcr & 0x04000000 ? 'B' : '-',
lcr & 0x02000000 ? 'C' : '-',
lcr & 0x01000000 ? 'D' : '-',
lcr & 0x00800000 ? 'W' : '-',
lcr & 0x00400000 ? 'R' : '-',
(lcr & 0x00030000) == 0x00000000 ? '4' :
(lcr & 0x00030000) == 0x00010000 ? '2' :
(lcr & 0x00030000) == 0x00020000 ? '1' :
'-'
);
}
#endif
#if 0
printk("\n");
#endif
} /* end dump_memory_map() */
/*****************************************************************************/
/*
* attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
*/
#ifdef CONFIG_MB93091_VDK
static void __init detect_mb93091(void)
{
#ifdef CONFIG_MB93090_MB00
/* Detect CB70 without motherboard */
if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
cpu_board1 = __frv_mb93090_mb00;
mb93090_mb00_detected = 1;
}
#endif
#ifdef CONFIG_FUJITSU_MB93493
cpu_board2 = __frv_mb93493;
#endif
} /* end detect_mb93091() */
#endif
/*****************************************************************************/
/*
* determine the CPU type and set appropriate parameters
*
* Family Series CPU Core Silicon Imple Vers
* ----------------------------------------------------------
* FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1]
* | | |
* | | +-> MB93401/A 02 01
* | | |
* | | +-> MB93403 02 02
* | |
* | +-> FR405 ----> MB93405 04 00
* |
* +-> FR450 ----> FR451 ----> MB93451 05 00
* |
* +-> FR500 ----> FR501 --+-> MB93501 01 01 [2]
* | |
* | +-> MB93501/A 01 02
* |
* +-> FR550 --+-> FR551 ----> MB93555 03 01
*
* [1] The MB93401 is an obsolete CPU replaced by the MB93401A
* [2] The MB93501 is an obsolete CPU replaced by the MB93501A
*
* Imple is PSR(Processor Status Register)[31:28].
* Vers is PSR(Processor Status Register)[27:24].
*
* A "Silicon" consists of CPU core and some on-chip peripherals.
*/
static void __init determine_cpu(void)
{
unsigned long hsr0 = __get_HSR(0);
unsigned long psr = __get_PSR();
/* work out what selectable services the CPU supports */
__set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
cpu_psr_all = __get_PSR();
__set_PSR(psr);
__set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
cpu_hsr0_all = __get_HSR(0);
__set_HSR(0, hsr0);
/* derive other service specs from the CPU type */
cpu_series = "unknown";
cpu_core = "unknown";
cpu_silicon = "unknown";
cpu_mmu = "Prot";
cpu_system = __frv_unknown_system;
clock_cmodes = NULL;
clock_doubled = 0;
#ifdef CONFIG_PM
clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
#endif
switch (PSR_IMPLE(psr)) {
case PSR_IMPLE_FR401:
cpu_series = "fr400";
cpu_core = "fr401";
pdm_suspend_mode = HSR0_PDM_PLL_RUN;
switch (PSR_VERSION(psr)) {
case PSR_VERSION_FR401_MB93401:
cpu_silicon = "mb93401";
cpu_system = __frv_mb93091_cb10;
clock_cmodes = clock_cmodes_fr401_fr403;
clock_doubled = 1;
break;
case PSR_VERSION_FR401_MB93401A:
cpu_silicon = "mb93401/A";
cpu_system = __frv_mb93091_cb11;
clock_cmodes = clock_cmodes_fr401_fr403;
break;
case PSR_VERSION_FR401_MB93403:
cpu_silicon = "mb93403";
#ifndef CONFIG_MB93093_PDK
cpu_system = __frv_mb93091_cb30;
#else
cpu_system = __frv_mb93093;
#endif
clock_cmodes = clock_cmodes_fr401_fr403;
break;
default:
break;
}
break;
case PSR_IMPLE_FR405:
cpu_series = "fr400";
cpu_core = "fr405";
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
switch (PSR_VERSION(psr)) {
case PSR_VERSION_FR405_MB93405:
cpu_silicon = "mb93405";
cpu_system = __frv_mb93091_cb60;
clock_cmodes = clock_cmodes_fr405;
#ifdef CONFIG_PM
clock_bits_settable |= CLOCK_BIT_CMODE;
clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
#endif
/* the FPGA on the CB70 has extra registers
* - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
* how we tell the difference between it and a CB60
*/
if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
cpu_system = __frv_mb93091_cb70;
break;
default:
break;
}
break;
case PSR_IMPLE_FR451:
cpu_series = "fr450";
cpu_core = "fr451";
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
#ifdef CONFIG_PM
clock_bits_settable |= CLOCK_BIT_CMODE;
clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
#endif
switch (PSR_VERSION(psr)) {
case PSR_VERSION_FR451_MB93451:
cpu_silicon = "mb93451";
cpu_mmu = "Prot, SAT, xSAT, DAT";
cpu_system = __frv_mb93091_cb451;
clock_cmodes = clock_cmodes_fr405;
break;
default:
break;
}
break;
case PSR_IMPLE_FR501:
cpu_series = "fr500";
cpu_core = "fr501";
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
switch (PSR_VERSION(psr)) {
case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break;
case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
default:
break;
}
break;
case PSR_IMPLE_FR551:
cpu_series = "fr550";
cpu_core = "fr551";
pdm_suspend_mode = HSR0_PDM_PLL_RUN;
switch (PSR_VERSION(psr)) {
case PSR_VERSION_FR551_MB93555:
cpu_silicon = "mb93555";
cpu_mmu = "Prot, SAT";
cpu_system = __frv_mb93091_cb41;
clock_cmodes = clock_cmodes_fr555;
clock_doubled = 1;
break;
default:
break;
}
break;
default:
break;
}
printk("- Series:%s CPU:%s Silicon:%s\n",
cpu_series, cpu_core, cpu_silicon);
#ifdef CONFIG_MB93091_VDK
detect_mb93091();
#endif
#if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
cpu_board2 = __frv_mb93493;
#endif
} /* end determine_cpu() */
/*****************************************************************************/
/*
* calculate the bus clock speed
*/
void __pminit determine_clocks(int verbose)
{
const struct clock_cmode *mode, *tmode;
unsigned long clkc, psr, quot;
clkc = __get_CLKC();
psr = __get_PSR();
clock_p0_current = !!(clkc & CLKC_P0);
clock_cm_current = clkc & CLKC_CM;
clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
if (verbose)
printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
/* the CB70 has some alternative ways of setting the clock speed through switches accessed
* through the FPGA. */
if (cpu_system == __frv_mb93091_cb70) {
unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
if (clkswr & 0x1000)
__clkin_clock_speed_HZ = 60000000UL;
else
__clkin_clock_speed_HZ =
((clkswr >> 8) & 0xf) * 10000000 +
((clkswr >> 4) & 0xf) * 1000000 +
((clkswr ) & 0xf) * 100000;
}
/* the FR451 is currently fixed at 24MHz */
else if (cpu_system == __frv_mb93091_cb451) {
//__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
if (clkswr & 0x1000)
__clkin_clock_speed_HZ = 60000000UL;
else
__clkin_clock_speed_HZ =
((clkswr >> 8) & 0xf) * 10000000 +
((clkswr >> 4) & 0xf) * 1000000 +
((clkswr ) & 0xf) * 100000;
}
/* otherwise determine the clockspeed from VDK or other registers */
else {
__clkin_clock_speed_HZ = __get_CLKIN();
}
/* look up the appropriate clock relationships table entry */
mode = &undef_clock_cmode;
if (clock_cmodes) {
tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
if (tmode->xbus)
mode = tmode;
}
#define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
if (clock_doubled)
__clkin_clock_speed_HZ <<= 1;
__ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
__sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
__dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
switch (clkc & CLKC_CM) {
case 0: /* High */
__core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
__core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core);
break;
case 1: /* Medium */
__core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
__core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
break;
case 2: /* Low; not supported */
case 3: /* UNDEF */
printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
panic("Bye");
}
__res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
if (clkc & CLKC_P0)
__res_bus_clock_speed_HZ >>= 1;
if (verbose) {
printk("CLKIN: %lu.%3.3luMHz\n",
__clkin_clock_speed_HZ / 1000000,
(__clkin_clock_speed_HZ / 1000) % 1000);
printk("CLKS:"
" ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
__ext_bus_clock_speed_HZ / 1000000,
__res_bus_clock_speed_HZ / 1000000,
__sdram_clock_speed_HZ / 1000000,
__core_bus_clock_speed_HZ / 1000000,
__core_clock_speed_HZ / 1000000,
__dsu_clock_speed_HZ / 1000000
);
}
/* calculate the number of __delay() loop iterations per sec (2 insn loop) */
__delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
/* set the serial prescaler */
__serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
quot = 1;
while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
quot += 1;
/* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
* - we have to be careful - dividing too much can mean we can't get 115200 baud
*/
if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
quot <<= 1;
__serial_clock_speed_HZ /= quot;
__frv_uart0.uartclk = __serial_clock_speed_HZ;
__frv_uart1.uartclk = __serial_clock_speed_HZ;
if (verbose)
printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
while (!(__get_UART0_LSR() & UART_LSR_TEMT))
continue;
while (!(__get_UART1_LSR() & UART_LSR_TEMT))
continue;
__set_UCPVR(quot);
__set_UCPSR(0);
} /* end determine_clocks() */
/*****************************************************************************/
/*
* reserve some DMA consistent memory
*/
#ifdef CONFIG_RESERVE_DMA_COHERENT
static void __init reserve_dma_coherent(void)
{
unsigned long ampr;
/* find the first non-kernel memory tile and steal it */
#define __steal_AMPR(r) \
if (__get_DAMPR(r) & xAMPRx_V) { \
ampr = __get_DAMPR(r); \
__set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \
__set_IAMPR(r, 0); \
goto found; \
}
__steal_AMPR(1);
__steal_AMPR(2);
__steal_AMPR(3);
__steal_AMPR(4);
__steal_AMPR(5);
__steal_AMPR(6);
if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
__steal_AMPR(7);
__steal_AMPR(8);
__steal_AMPR(9);
__steal_AMPR(10);
__steal_AMPR(11);
__steal_AMPR(12);
__steal_AMPR(13);
__steal_AMPR(14);
}
/* unable to grant any DMA consistent memory */
printk("No DMA consistent memory reserved\n");
return;
found:
dma_coherent_mem_start = ampr & xAMPRx_PPFN;
ampr &= xAMPRx_SS;
ampr >>= 4;
ampr = 1 << (ampr - 3 + 20);
dma_coherent_mem_end = dma_coherent_mem_start + ampr;
printk("DMA consistent memory reserved %lx-%lx\n",
dma_coherent_mem_start, dma_coherent_mem_end);
} /* end reserve_dma_coherent() */
#endif
/*****************************************************************************/
/*
* calibrate the delay loop
*/
void __cpuinit calibrate_delay(void)
{
loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
loops_per_jiffy / (500000 / HZ),
(loops_per_jiffy / (5000 / HZ)) % 100);
} /* end calibrate_delay() */
/*****************************************************************************/
/*
* look through the command line for some things we need to know immediately
*/
static void __init parse_cmdline_early(char *cmdline)
{
if (!cmdline)
return;
while (*cmdline) {
if (*cmdline == ' ')
cmdline++;
/* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
* out from the SDRAM controller mask register
*/
if (!memcmp(cmdline, "mem=", 4)) {
unsigned long long mem_size;
mem_size = memparse(cmdline + 4, &cmdline);
memory_end = memory_start + mem_size;
}
while (*cmdline && *cmdline != ' ')
cmdline++;
}
} /* end parse_cmdline_early() */
/*****************************************************************************/
/*
*
*/
void __init setup_arch(char **cmdline_p)
{
#ifdef CONFIG_MMU
printk("Linux FR-V port done by Red Hat Inc <[email protected]>\n");
#else
printk("uClinux FR-V port done by Red Hat Inc <[email protected]>\n");
#endif
memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
determine_cpu();
determine_clocks(1);
/* For printk-directly-beats-on-serial-hardware hack */
console_set_baud(115200);
#ifdef CONFIG_GDBSTUB
gdbstub_set_baud(115200);
#endif
#ifdef CONFIG_RESERVE_DMA_COHERENT
reserve_dma_coherent();
#endif
dump_memory_map();
#ifdef CONFIG_MB93090_MB00
if (mb93090_mb00_detected)
mb93090_display();
#endif
/* register those serial ports that are available */
#ifdef CONFIG_FRV_ONCPU_SERIAL
#ifndef CONFIG_GDBSTUB_UART0
__reg(UART0_BASE + UART_IER * 8) = 0;
early_serial_setup(&__frv_uart0);
#endif
#ifndef CONFIG_GDBSTUB_UART1
__reg(UART1_BASE + UART_IER * 8) = 0;
early_serial_setup(&__frv_uart1);
#endif
#endif
/* deal with the command line - RedBoot may have passed one to the kernel */
memcpy(command_line, boot_command_line, sizeof(command_line));
*cmdline_p = &command_line[0];
parse_cmdline_early(command_line);
/* set up the memory description
* - by now the stack is part of the init task */
printk("Memory %08lx-%08lx\n", memory_start, memory_end);
BUG_ON(memory_start == memory_end);
init_mm.start_code = (unsigned long) &_stext;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
#if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
init_mm.brk = (unsigned long) &_end;
#else
init_mm.brk = (unsigned long) 0;
#endif
#ifdef DEBUG
printk("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x BSS=0x%06x-0x%06x\n",
(int) &_stext, (int) &_etext,
(int) &_sdata, (int) &_edata,
(int) &_sbss, (int) &_ebss);
#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
#ifdef CONFIG_MMU
setup_linux_memory();
#else
setup_uclinux_memory();
#endif
/* get kmalloc into gear */
paging_init();
/* init DMA */
frv_dma_init();
#ifdef DEBUG
printk("Done setup_arch\n");
#endif
/* start the decrement timer running */
// asm volatile("movgs %0,timerd" :: "r"(10000000));
// __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
} /* end setup_arch() */
#if 0
/*****************************************************************************/
/*
*
*/
static int __devinit setup_arch_serial(void)
{
/* register those serial ports that are available */
#ifndef CONFIG_GDBSTUB_UART0
early_serial_setup(&__frv_uart0);
#endif
#ifndef CONFIG_GDBSTUB_UART1
early_serial_setup(&__frv_uart1);
#endif
return 0;
} /* end setup_arch_serial() */
late_initcall(setup_arch_serial);
#endif
/*****************************************************************************/
/*
* set up the memory map for normal MMU linux
*/
#ifdef CONFIG_MMU
static void __init setup_linux_memory(void)
{
unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
kstart = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
kend = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
kstart = kstart & PAGE_MASK;
kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
/* give all the memory to the bootmap allocator, tell it to put the
* boot mem_map immediately following the kernel image
*/
bootmap_size = init_bootmem_node(NODE_DATA(0),
kend >> PAGE_SHIFT, /* map addr */
memory_start >> PAGE_SHIFT, /* start of RAM */
memory_end >> PAGE_SHIFT /* end of RAM */
);
/* pass the memory that the kernel can immediately use over to the bootmem allocator */
max_mapnr = num_physpages = (memory_end - memory_start) >> PAGE_SHIFT;
low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
high_mem = 0;
if (num_physpages > low_top_pfn) {
#ifdef CONFIG_HIGHMEM
high_mem = num_physpages - low_top_pfn;
#else
max_mapnr = num_physpages = low_top_pfn;
#endif
}
else {
low_top_pfn = num_physpages;
}
min_low_pfn = memory_start >> PAGE_SHIFT;
max_low_pfn = low_top_pfn;
max_pfn = memory_end >> PAGE_SHIFT;
num_mappedpages = low_top_pfn;
printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
#ifdef CONFIG_HIGHMEM
if (high_mem)
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
#endif
/* take back the memory occupied by the kernel image and the bootmem alloc map */
reserve_bootmem(kstart, kend - kstart + bootmap_size,
BOOTMEM_DEFAULT);
/* reserve the memory occupied by the initial ramdisk */
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
reserve_bootmem(INITRD_START, INITRD_SIZE,
BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
}
else {
printk(KERN_ERR
"initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
"disabling initrd\n",
INITRD_START + INITRD_SIZE,
low_top_pfn << PAGE_SHIFT);
initrd_start = 0;
}
}
#endif
} /* end setup_linux_memory() */
#endif
/*****************************************************************************/
/*
* set up the memory map for uClinux
*/
#ifndef CONFIG_MMU
static void __init setup_uclinux_memory(void)
{
#ifdef CONFIG_PROTECT_KERNEL
unsigned long dampr;
#endif
unsigned long kend;
int bootmap_size;
kend = (unsigned long) &__kernel_image_end;
kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
/* give all the memory to the bootmap allocator, tell it to put the
* boot mem_map immediately following the kernel image
*/
bootmap_size = init_bootmem_node(NODE_DATA(0),
kend >> PAGE_SHIFT, /* map addr */
memory_start >> PAGE_SHIFT, /* start of RAM */
memory_end >> PAGE_SHIFT /* end of RAM */
);
/* free all the usable memory */
free_bootmem(memory_start, memory_end - memory_start);
high_memory = (void *) (memory_end & PAGE_MASK);
max_mapnr = num_physpages = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
min_low_pfn = memory_start >> PAGE_SHIFT;
max_low_pfn = memory_end >> PAGE_SHIFT;
max_pfn = max_low_pfn;
/* now take back the bits the core kernel is occupying */
#ifndef CONFIG_PROTECT_KERNEL
reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
reserve_bootmem((unsigned long) &__kernel_image_start,
kend - (unsigned long) &__kernel_image_start,
BOOTMEM_DEFAULT);
#else
dampr = __get_DAMPR(0);
dampr &= xAMPRx_SS;
dampr = (dampr >> 4) + 17;
dampr = 1 << dampr;