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8254fd16fa
Fix linting problem Add phys_be and phys_le with build options for GOARCH General clean-ups Signed-off-by: Christopher Meis <christopher.meis@9elements.com>
121 lines
3.2 KiB
Go
121 lines
3.2 KiB
Go
// Copyright 2012-2019 the u-root Authors. All rights reserved
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package hwapi
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import (
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"fmt"
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"unsafe"
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)
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// UintN is a wrapper around uint types and provides a few io-related
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// functions.
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type UintN interface {
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// Return size in bytes.
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Size() int64
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// Return string formatted in hex.
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String() string
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// Read from given address with native endianess.
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read(addr unsafe.Pointer) error
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// Write to given address with native endianess.
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write(addr unsafe.Pointer) error
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}
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// Uint8 is a wrapper around uint8.
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type Uint8 uint8
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// Uint16 is a wrapper around uint16.
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type Uint16 uint16
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// Uint32 is a wrapper around uint32.
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type Uint32 uint32
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// Uint64 is a wrapper around uint64.
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type Uint64 uint64
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// Size of uint8 is 1.
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func (u *Uint8) Size() int64 {
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return 1
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}
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// Size of uint16 is 2.
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func (u *Uint16) Size() int64 {
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return 2
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}
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// Size of uint32 is 4.
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func (u *Uint32) Size() int64 {
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return 4
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}
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// Size of uint64 is 8.
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func (u *Uint64) Size() int64 {
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return 8
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}
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// String formats a uint8 in hex.
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func (u *Uint8) String() string {
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return fmt.Sprintf("%#02x", *u)
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}
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// String formats a uint16 in hex.
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func (u *Uint16) String() string {
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return fmt.Sprintf("%#04x", *u)
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}
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// String formats a uint32 in hex.
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func (u *Uint32) String() string {
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return fmt.Sprintf("%#08x", *u)
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}
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// String formats a uint64 in hex.
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func (u *Uint64) String() string {
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return fmt.Sprintf("%#016x", *u)
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}
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func (u *Uint8) read(addr unsafe.Pointer) error {
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*u = Uint8(*(*uint8)(addr)) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint16) read(addr unsafe.Pointer) error {
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*u = Uint16(*(*uint16)(addr)) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint32) read(addr unsafe.Pointer) error {
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*u = Uint32(*(*uint32)(addr)) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint64) read(addr unsafe.Pointer) error {
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// Warning: On arm, this uses two ldr's rather than ldrd.
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*u = Uint64(*(*uint64)(addr)) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint8) write(addr unsafe.Pointer) error {
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*(*uint8)(addr) = uint8(*u) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint16) write(addr unsafe.Pointer) error {
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*(*uint16)(addr) = uint16(*u) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint32) write(addr unsafe.Pointer) error {
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*(*uint32)(addr) = uint32(*u) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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func (u *Uint64) write(addr unsafe.Pointer) error {
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// Warning: On arm, this uses two str's rather than strd.
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*(*uint64)(addr) = uint64(*u) // TODO: rewrite in Go assembly for ARM
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return nil // TODO: catch misalign, segfault, sigbus, ...
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}
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