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Make Page Address to pageNumber
continuous-integration/drone/push Build is failing
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master
kolaente 5 years ago
parent a53fcddb58
commit f56cfdd5a8
Signed by: kolaente
GPG Key ID: F40E70337AB24C9B
1 changed files with 7 additions and 7 deletions
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  1. 14
      hal/paging.go

14
hal/paging.go
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@ -7,7 +7,7 @@ var defaultRegister uint16 = 0
type Page struct { type Page struct {
Referenced bool Referenced bool
RegisterAddress *uint16 RegisterAddress *uint16
Address Address PageNumber uint16
} }
// PageTable uses key as page number // PageTable uses key as page number
@ -16,12 +16,12 @@ type PageTable map[uint16]*Page
type Address uint16 type Address uint16
type MMU struct { type MMU struct {
PageTable *PageTable PageTable PageTable
LoadedPages []*Page LoadedPages []*Page
Registers []float64 // 4k registers Registers []float64 // 4k registers
// pseudo hard drive which holds all pages // pseudo hard drive which holds all pages
drive map[Address][]float64 drive map[uint16][]float64
} }
func (address Address) PageNumber() uint16 { func (address Address) PageNumber() uint16 {
@ -32,14 +32,14 @@ func (address Address) Offset() uint16 {
return uint16(address) & 0x03FF return uint16(address) & 0x03FF
} }
func (table PageTable) Find(address Address) { func (mmu *MMU) Find(address Address) {
// 10 bit for one register in a page // 10 bit for one register in a page
// 6 bit to address the page // 6 bit to address the page
// 000010 | 0000000011 // 000010 | 0000000011
// -> Page 2, offset 3 // -> Page 2, offset 3
// Find the page with that number // Find the page with that number
page := table[address.PageNumber()] page := mmu.PageTable[address.PageNumber()]
// Page not loaded in "physical" register // Page not loaded in "physical" register
if page.RegisterAddress == nil { if page.RegisterAddress == nil {
@ -89,7 +89,7 @@ func (mmu *MMU) findEmptyRegisterAddress() *uint16 {
func (mmu *MMU) movePageToDrive(page *Page) { func (mmu *MMU) movePageToDrive(page *Page) {
for i := 0; i < PageSize-1; i++ { for i := 0; i < PageSize-1; i++ {
mmu.drive[page.Address][i] = mmu.Registers[i+page.RegisterOffset()] mmu.drive[page.PageNumber][i] = mmu.Registers[i+page.RegisterOffset()]
} }
page.RegisterAddress = nil page.RegisterAddress = nil
@ -97,7 +97,7 @@ func (mmu *MMU) movePageToDrive(page *Page) {
func (mmu *MMU) loadPageFromDrive(page *Page) { func (mmu *MMU) loadPageFromDrive(page *Page) {
for i := 0; i < PageSize-1; i++ { for i := 0; i < PageSize-1; i++ {
mmu.Registers[i+page.RegisterOffset()] = mmu.drive[page.Address][i] mmu.Registers[i+page.RegisterOffset()] = mmu.drive[page.PageNumber][i]
} }
page.RegisterAddress = mmu.findEmptyRegisterAddress() page.RegisterAddress = mmu.findEmptyRegisterAddress()
} }

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