From e2b78d20b80d89321d8d9df3ab8ade8407642dfc Mon Sep 17 00:00:00 2001 From: Aleksa Vučković Date: Sun, 2 Jan 2022 22:56:02 +0100 Subject: Adding code --- include/09.paging/paging04.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 include/09.paging/paging04.c (limited to 'include/09.paging/paging04.c') diff --git a/include/09.paging/paging04.c b/include/09.paging/paging04.c new file mode 100644 index 0000000..ad7507f --- /dev/null +++ b/include/09.paging/paging04.c @@ -0,0 +1,15 @@ +void set_pt(size_t num,uint32_t address) +{ + // holds the physical address where we want to start mapping these pages to. + // in this case, we want to map these pages to the very beginning of memory. + //we will fill all 1024 entries in the table, mapping 4 megabytes + for(size_t i=0;i<1024;i++) + { + // As the address is page aligned, it will always leave 12 bits zeroed. + // Those bits are used by the attributes ;) + page_table[num][i] = (address + i * 0x1000) | 3; // attributes: supervisor level, read/write, present. + } + + page_directory[num] = ((uint32_t)page_table[num]) | 3; + // attributes: supervisor level, read/write, present +} -- cgit v1.2.3