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authornoroadsleft <18669334+noroadsleft@users.noreply.github.com>2018-10-01 20:35:09 -0700
committerDrashna Jaelre <drashna@live.com>2018-10-01 20:35:09 -0700
commitabcf64ecbdadc226350d457dfdc5079ce51fd72c (patch)
tree4bf56d3a893b1f7b5bbcacadedae9158f7a59339 /lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/Config
parent713ec91147aa56849f9e2ff93ee98ef1eb6eebc0 (diff)
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Keyboard: DZ60 cleanup (#3994)
* DZ60: Deleted K214 from LAYOUT_all * DZ60: Delete matrix LAYOUT_2_shifts; replace with LAYOUT_all After the deletion of K214 from LAYOUT_all, LAYOUT_all and LAYOUT_2_shifts are identical. Deprecated LAYOUT_2_shifts in favor of LAYOUT_all. * DZ60: refactor 256k_HHKB and itsaferbie keymaps to use LAYOUT_60_hhkb macro Both keymaps previously used the LAYOUT_hhkb macro. After comparing the macros, the only difference between them was that LAYOUT_hhkb included the place of the ISO Backslash key. Neither keymap used this key, so both were refactored to use LAYOUT_60_hhkb instead. LAYOUT_hhkb is now essentially unused by any keymaps in the repo. (More on that in a moment.) * DZ60: bugfix for dbroqua keymap This keymap had two layers that used the LAYOUT_true_hhkb macro and a third that used LAYOUT_hhkb. These macros have the same number of keys, but represent different physical layouts. As the "main" layers used LAYOUT_true_hhkb, switched the third layer to LAYOUT_true_hhkb as well. The LAYOUT_hhkb macro is now unused by any DZ60 keymaps in the repo, and can be safely deleted. * DZ60: bugfix for 60_ansi_arrow_fkeys, 60_plus_arrows, and stephengrier keymaps All three keymaps had one layer in LAYOUT_all and one in LAYOUT_directional. Only difference between these macros is LAYOUT_all excludes the ISO Backslash position. As none of the keymaps used this position, all layers were switched to use LAYOUT_directional. * DZ60: added layout mock-ups to dz60.h Documenting the physical layouts that go with each matrix. * DZ60: replace TMK SHIFT_ESC with QMK Grave Escape Replaced all instances of keycodes that called TMK's ACTION_FUNCTION(SHIFT_ESC) with QMK's KC_GESC, and added config.h files so KC_GESC behaves as the deprecated TMK function did, except for the default keymap, which I thought should have the QMK standard behavior. * DZ60: delete SHIFT_ESC code blocks Deleted ACTION_FUNCTION(SHIFT_ESC) code blocks from keymaps that didn't use the functionality it provided. * DZ60: deleted unused MODS_CTRL_MASk definitions Was used in the now-deleted SHIFT_ESC code blocks. Interestingly named MODS_CTRL_MASK when it was actually checking the Shift keys. *shrug* * DZ60: refactor jkbone keymap to use process_record_user Replaced TMK action_function keycodes with QMK process_record_user equivalents. * DZ60: delete unused layout macros The macros LAYOUT_hhkb, LAYOUT_directional_625_space, and LAYOUT_60_ansi_split_bs_rshift_5x1u were unused by any keymaps in the repo, and have thus been deleted. * DZ60: refactor iso_6u_space and iso_7u_space keymaps Both keymaps refactored to use the LAYOUT_60_iso macro. * DZ60: refactor dz60.h Updated the notation of the switch arguments. Format is now: `k<row><column>` where `<row>` is `[0-4]` and `<column>` is `[0-9a-e]`. * DZ60: refactor LAYOUT_60_iso_5x1u matrix Updated matrix so `KC_ENT` belongs on the home row, which is consistent with LAYOUT_60_iso for the DZ60 as well as the ISO community layouts. * DZ60: fix white space in dz60.h I hate when indentation is inconsistent within a file.
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/* 
 ****************************************************************************
 * (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
 * (C) 2005 - Grzegorz Milos - Intel Research Cambridge
 ****************************************************************************
 *
 *        File: mm.c
 *      Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
 *     Changes: Grzegorz Milos
 *              
 *        Date: Aug 2003, chages Aug 2005
 * 
 * Environment: Xen Minimal OS
 * Description: memory management related functions
 *              contains buddy page allocator from Xen.
 *
 ****************************************************************************
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */

#include <os.h>
#include <hypervisor.h>
#include <mm.h>
#include <types.h>
#include <lib.h>
#include <xmalloc.h>

#ifdef MM_DEBUG
#define DEBUG(_f, _a...) \
    printk("MINI_OS(file=mm.c, line=%d) " _f "\n", __LINE__, ## _a)
#else
#define DEBUG(_f, _a...)    ((void)0)
#endif

unsigned long *phys_to_machine_mapping;
extern char *stack;
extern char _text, _etext, _edata, _end;


/*********************
 * ALLOCATION BITMAP
 *  One bit per page of memory. Bit set => page is allocated.
 */

static unsigned long *alloc_bitmap;
#define PAGES_PER_MAPWORD (sizeof(unsigned long) * 8)

#define allocated_in_map(_pn) \
(alloc_bitmap[(_pn)/PAGES_PER_MAPWORD] & (1<<((_pn)&(PAGES_PER_MAPWORD-1))))


/*
 * Hint regarding bitwise arithmetic in map_{alloc,free}:
 *  -(1<<n)  sets all bits >= n. 
 *  (1<<n)-1 sets all bits <  n.
 * Variable names in map_{alloc,free}:
 *  *_idx == Index into `alloc_bitmap' array.
 *  *_off == Bit offset within an element of the `alloc_bitmap' array.
 */

static void map_alloc(unsigned long first_page, unsigned long nr_pages)
{
    unsigned long start_off, end_off, curr_idx, end_idx;

    curr_idx  = first_page / PAGES_PER_MAPWORD;
    start_off = first_page & (PAGES_PER_MAPWORD-1);
    end_idx   = (first_page + nr_pages) / PAGES_PER_MAPWORD;
    end_off   = (first_page + nr_pages) & (PAGES_PER_MAPWORD-1);

    if ( curr_idx == end_idx )
    {
        alloc_bitmap[curr_idx] |= ((1<<end_off)-1) & -(1<<start_off);
    }
    else 
    {
        alloc_bitmap[curr_idx] |= -(1<<start_off);
        while ( ++curr_idx < end_idx ) alloc_bitmap[curr_idx] = ~0L;
        alloc_bitmap[curr_idx] |= (1<<end_off)-1;
    }
}


static void map_free(unsigned long first_page, unsigned long nr_pages)
{
    unsigned long start_off, end_off, curr_idx, end_idx;

    curr_idx = first_page / PAGES_PER_MAPWORD;
    start_off = first_page & (PAGES_PER_MAPWORD-1);
    end_idx   = (first_page + nr_pages) / PAGES_PER_MAPWORD;
    end_off   = (first_page + nr_pages) & (PAGES_PER_MAPWORD-1);

    if ( curr_idx == end_idx )
    {
        alloc_bitmap[curr_idx] &= -(1<<end_off) | ((1<<start_off)-1);
    }
    else 
    {
        alloc_bitmap[curr_idx] &= (1<<start_off)-1;
        while ( ++curr_idx != end_idx ) alloc_bitmap[curr_idx] = 0;
        alloc_bitmap[curr_idx] &= -(1<<end_off);
    }
}



/*************************
 * BINARY BUDDY ALLOCATOR
 */

typedef struct chunk_head_st chunk_head_t;
typedef struct chunk_tail_st chunk_tail_t;

struct chunk_head_st {
    chunk_head_t  *next;
    chunk_head_t **pprev;
    int            level;
};

struct chunk_tail_st {
    int level;
};

/* Linked lists of free chunks of different powers-of-two in size. */
#define FREELIST_SIZE ((sizeof(void*)<<3)-PAGE_SHIFT)
static chunk_head_t *free_head[FREELIST_SIZE];
static chunk_head_t  free_tail[FREELIST_SIZE];
#define FREELIST_EMPTY(_l) ((_l)->next == NULL)

#define round_pgdown(_p)  ((_p)&PAGE_MASK)
#define round_pgup(_p)    (((_p)+(PAGE_SIZE-1))&PAGE_MASK)

#ifdef MM_DEBUG
/*
 * Prints allocation[0/1] for @nr_pages, starting at @start
 * address (virtual).
 */
static void print_allocation(void *start, int nr_pages)
{
    unsigned long pfn_start = virt_to_pfn(start);
    int count;
    for(count = 0; count < nr_pages; count++)
        if(allocated_in_map(pfn_start + count)) printk("1");
        else printk("0");
        
    printk("\n");        
}

/*
 * Prints chunks (making them with letters) for @nr_pages starting
 * at @start (virtual).
 */
static void print_chunks(void *start, int nr_pages)
{
    char chunks[1001], current='A';
    int order, count;
    chunk_head_t *head;
    unsigned long pfn_start = virt_to_pfn(start);
   
    memset(chunks, (int)'_', 1000);
    if(nr_pages > 1000) 
    {
        DEBUG("Can only pring 1000 pages. Increase buffer size.");
    }
    
    for(order=0; order < FREELIST_SIZE; order++)
    {
        head = free_head[order];
        while(!FREELIST_EMPTY(head))
        {
            for(count = 0; count < 1<< head->level; count++)
            {
                if(count + virt_to_pfn(head) - pfn_start < 1000)
                    chunks[count + virt_to_pfn(head) - pfn_start] = current;
            }
            head = head->next;
            current++;
        }
    }
    chunks[nr_pages] = '\0';
    printk("%s\n", chunks);
}
#endif


/*
 * Initialise allocator, placing addresses [@min,@max] in free pool.
 * @min and @max are PHYSICAL addresses.
 */
static void init_page_allocator(unsigned long min, unsigned long max)
{
    int i;
    unsigned long range, bitmap_size;
    chunk_head_t *ch;
    chunk_tail_t *ct;

    for ( i = 0; i < FREELIST_SIZE; i++ )
    {
        free_head[i]       = &free_tail[i];
        free_tail[i].pprev = &free_head[i];
        free_tail[i].next  = NULL;
    }

    min = round_pgup  (min);
    max = round_pgdown(max);

    /* Allocate space for the allocation bitmap. */
    bitmap_size  = (max+1) >> (PAGE_SHIFT+3);
    bitmap_size  = round_pgup(bitmap_size);
    alloc_bitmap = (unsigned long *)to_virt(min);
    min         += bitmap_size;
    range        = max - min;

    /* All allocated by default. */
    memset(alloc_bitmap, ~0, bitmap_size);
    /* Free up the memory we've been given to play with. */
    map_free(min>>PAGE_SHIFT, range>>PAGE_SHIFT);

    /* The buddy lists are addressed in high memory. */
    min += VIRT_START;
    max += VIRT_START;

    while ( range != 0 )
    {
        /*
         * Next chunk is limited by alignment of min, but also
         * must not be bigger than remaining range.
         */
        for ( i = PAGE_SHIFT; (1<<(i+1)) <= range; i++ )
            if ( min & (1<<i) ) break;


        ch = (chunk_head_t *)min;
        min   += (1<<i);
        range -= (1<<i);