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114 lines
2.2 KiB
ArmAsm
114 lines
2.2 KiB
ArmAsm
/* C-interface for AMBA PnP scanning functions implemented in
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* ambapp_low.S. At the point the memory and stack can be
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* used.
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*
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* (C) Copyright 2010, 2015
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* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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.seg "text"
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.extern _nomem_ambapp_find_buses
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.extern _nomem_find_apb
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.extern _nomem_find_ahb
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.globl ambapp_find_buses
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.globl ambapp_find_apb
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.globl ambapp_find_ahb
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/* C-interface for _nomem_ambapp_find_buses used when memory is available.
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*/
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ambapp_find_buses:
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save %sp, -104, %sp
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mov %i1, %l7 /* Save second argument */
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call _nomem_ambapp_find_buses
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mov %i0, %o0
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/* Store result */
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st %g0, [%l7+0x00]
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st %i0, [%l7+0x04]
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st %i1, [%l7+0x08]
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st %i2, [%l7+0x0c]
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st %i3, [%l7+0x10]
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st %i4, [%l7+0x14]
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st %i5, [%l7+0x18]
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ret
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restore
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/* C-interface for _nomem_find_apb used when memory is available.
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*
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* void ambapp_find_apb(
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* struct ambapp_bus *abus,
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* unsigned int dev_vend,
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* int index,
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* struct ambapp_find_apb_info *result
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* );
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*
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*/
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ambapp_find_apb:
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save %sp, -104, %sp
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mov %i3, %l7 /* Save second argument */
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mov %i1, %o1
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mov %i2, %o2
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/* Initialize buses available in system */
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ld [%i0+0x08], %i1
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ld [%i0+0x0c], %i2
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ld [%i0+0x10], %i3
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ld [%i0+0x14], %i4
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ld [%i0+0x18], %i5
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call _nomem_find_apb
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ld [%i0+0x04], %i0
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st %o2, [%l7+0x08] /* Decremented Index */
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st %o3, [%l7] /* PnP configuration address of APB Device */
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st %o4, [%l7+0x04] /* AHB Bus Index of AHB/APB bridge and APB Device */
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mov %o0, %i0
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ret
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restore
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/* C-interface for _nomem_find_ahb used when memory is available.
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*
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* void ambapp_find_ahb(
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* struct ambapp_bus *abus,
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* unsigned int dev_vend,
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* int index,
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* int type,
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* struct ambapp_find_ahb_info *result
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* );
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*
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*/
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ambapp_find_ahb:
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save %sp, -104, %sp
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mov %i4, %l7 /* Save second argument */
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clr %o0
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mov %i1, %o1
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mov %i2, %o2
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clr %o3
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clr %o4
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mov %i3, %o5
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/* Initialize buses available in system */
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ld [%i0+0x08], %i1
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ld [%i0+0x0c], %i2
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ld [%i0+0x10], %i3
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ld [%i0+0x14], %i4
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ld [%i0+0x18], %i5
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call _nomem_find_ahb
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ld [%i0+0x04], %i0
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st %o2, [%l7+0x08] /* Decremented Index */
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st %o3, [%l7] /* PnP configuration address of AHB Device */
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st %o4, [%l7+0x04] /* AHB Bus Index of AHB Device */
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mov %o0, %i0
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ret
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restore
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