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parisc: Make existing core files reuseable for bootloader

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Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2017-08-20 10:52:22 +02:00
parent 2f3c7b8137
commit f5213b2c40
4 changed files with 24 additions and 1 deletions
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4
arch/parisc/include/asm/page.h
View File

@ -116,11 +116,15 @@ extern int npmem_ranges;
/* This governs the relationship between virtual and physical addresses.
* If you alter it, make sure to take care of our various fixed mapping
* segments in fixmap.h */
#if defined(BOOTLOADER)
#define __PAGE_OFFSET (0) /* bootloader uses physical addresses */
#else
#ifdef CONFIG_64BIT
#define __PAGE_OFFSET (0x40000000) /* 1GB */
#else
#define __PAGE_OFFSET (0x10000000) /* 256MB */
#endif
#endif /* BOOTLOADER */
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)

2
arch/parisc/include/asm/pdc.h
View File

@ -5,6 +5,8 @@
#if !defined(__ASSEMBLY__)
extern int parisc_narrow_firmware;
extern int pdc_type;
extern unsigned long parisc_cell_num; /* cell number the CPU runs on (PAT) */
extern unsigned long parisc_cell_loc; /* cell location of CPU (PAT) */

15
arch/parisc/kernel/firmware.c
View File

@ -69,7 +69,15 @@
#include <asm/pdcpat.h>
#include <asm/processor.h> /* for boot_cpu_data */
#if defined(BOOTLOADER)
# undef spin_lock_irqsave
# define spin_lock_irqsave(a, b) { b = 1; }
# undef spin_unlock_irqrestore
# define spin_unlock_irqrestore(a, b)
#else
static DEFINE_SPINLOCK(pdc_lock);
#endif
extern unsigned long pdc_result[NUM_PDC_RESULT];
extern unsigned long pdc_result2[NUM_PDC_RESULT];
@ -186,6 +194,8 @@ void set_firmware_width(void)
}
#endif /*CONFIG_64BIT*/
#if !defined(BOOTLOADER)
/**
* pdc_emergency_unlock - Unlock the linux pdc lock
*
@ -1149,6 +1159,8 @@ void pdc_io_reset_devices(void)
spin_unlock_irqrestore(&pdc_lock, flags);
}
#endif /* defined(BOOTLOADER) */
/* locked by pdc_console_lock */
static int __attribute__((aligned(8))) iodc_retbuf[32];
static char __attribute__((aligned(64))) iodc_dbuf[4096];
@ -1193,6 +1205,7 @@ print:
return i;
}
#if !defined(BOOTLOADER)
/**
* pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
*
@ -1555,6 +1568,7 @@ int pdc_pat_mem_get_dimm_phys_location(
return retval;
}
#endif /* CONFIG_64BIT */
#endif /* defined(BOOTLOADER) */
/***************** 32-bit real-mode calls ***********/
@ -1664,4 +1678,3 @@ long real64_call(unsigned long fn, ...)
}
#endif /* CONFIG_64BIT */

4
arch/parisc/kernel/real2.S
View File

@ -162,6 +162,7 @@ ENDPROC_CFI(restore_control_regs)
.text
.align 128
ENTRY_CFI(rfi_virt2real)
#if !defined(BOOTLOADER)
/* switch to real mode... */
rsm PSW_SM_I,%r0
load32 PA(rfi_v2r_1), %r1
@ -191,6 +192,7 @@ ENTRY_CFI(rfi_virt2real)
nop
rfi_v2r_1:
tophys_r1 %r2
#endif /* defined(BOOTLOADER) */
bv 0(%r2)
nop
ENDPROC_CFI(rfi_virt2real)
@ -198,6 +200,7 @@ ENDPROC_CFI(rfi_virt2real)
.text
.align 128
ENTRY_CFI(rfi_real2virt)
#if !defined(BOOTLOADER)
rsm PSW_SM_I,%r0
load32 (rfi_r2v_1), %r1
nop
@ -226,6 +229,7 @@ ENTRY_CFI(rfi_real2virt)
nop
rfi_r2v_1:
tovirt_r1 %r2
#endif /* defined(BOOTLOADER) */
bv 0(%r2)
nop
ENDPROC_CFI(rfi_real2virt)